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After hearing the news, Sara Baker and Jennifer Lott from the neighboring state of Washington launched a fundraising drive to purchase 350 copies of the book, raising nearly around $3,000 to do so. While this book was a World Book Night title in 2012, it was not a part of this year’s WBN celebration; however, Kissel, Baker, and Lott distributed their purchased copies of the book this year on April 23rd to coincide with WBN. After learning of the situation and the resulting purchase of its books, Little, Brown Books for Young Readers, who published the title, made an additional donation of 350 copies of the book for the group to distribute. This is not the first time Alexie’s book has been challenged or banned. In fact, according to the ALA, it is currently the second most often challenged book in the US. But this may be one of the first times that individuals have fought censorship by buying the book and giving it away, and certainly one of the rare times that a publisher has given away this much stock of one of its titles in order to fight book banning. Unfortunately, it was a cost that didn’t have to be fronted. With the incredible tools available through digital publishing, the cost to purchase and give away the ebook for the individuals who fund raised could have been negligible compared to the cost of a print edition (note: unfortunately, the publisher has set the ebook edition price of this title at $9.99, higher than the $8.52 per print copy that the protest organizers spent through Rediscovered Books). And despite the misunderstood belief that publishers are simply swimming in piles of printed books that they can afford to give away, LBYR could have distributed digital editions of the book for nearly nothing, or at the very least lowered the price of the ebook in protest. With the thriving choke hold that censorship has over public education and libraries, protests of this kind will be too costly to keep up. As it stands, 700 people were given a copy of this brilliant book that critics don’t want them to read, but the distribution and the resulting fight against censorship could reach so much farther through digital. The Impact of eBooks on the Fight Against Censorship is a post from: Good e-Reader |
A Semi-automated Technology Roundup Provided by Linebaugh Public Library IT Staff | techblog.linebaugh.org
Sunday, April 27, 2014
The Impact of eBooks on the Fight Against Censorship
Encyclopedia Britannica to Distribute Kids eBook Titles
| Encyclopedia Britannica has just signed a distribution agreement with Indian childrens publisher Katha. Britannica intends on digitizing the 300 titles translated from 21 Indian languages on a worldwide basis. Times are a changin for Encyclopaedia Britannica, which is primarily known for their 32 volume set. The company is starting to diversify into broader consumer markets with a focus on education and digital learning. Britannica intends on marketing the childrens books to schools in all major markets for ages one to eight. Basically the big goal is to digitize the eBooks and then market them right back into India. A special emphasis will be in giving big deals with Katha schools and learning centres for underprivileged children. Encyclopedia Britannica to Distribute Kids eBook Titles is a post from: Good e-Reader |
Saturday, April 26, 2014
Comixology Introduces New Payment System and Paypal for Android and Blackberry
| Comixology has updated their official Android app today that phases out the Google Merchant Account system. Instead Comixology will be using their own in-house shopping cart, where all purchases are made directly with the comix book company. In addition they have also introduced the ability to pay via PAYPAL. Two weeks ago Amazon announced the intent to purchase Comixology and the deal closes in a month or two. In order to transition properly Comixology is phasing out Apple and Google as merchant providers, in order to cut down on the costs of dealing with them. This has prompted Comixology to release a brand new iPhone and iPad app that eliminate in-app purchases altogether. Luckily, you can can still make purchases with the updated Android app and the one we converted for Blackberry 10 and the Playbook. It is important to note that you should back up all of your comics before you install the new update for Android and for Blackberry. We have heard numerous reports of comics not importing properly under the new system. Download the updated Android app or the Playbook/Blackberry 10 App today from the Good e-Reader App Store. Comixology Introduces New Payment System and Paypal for Android and Blackberry is a post from: Good e-Reader |
Comixology Disables Purchases on iOS
| Just weeks after Amazon purchased Comixology the comic book company has released a new app for iOS that disables the ability to purchase new content. The read only app encourages users to buy comics from the Comixology website instead of one click purchases. ComiXology recommends that their users back up their purchases through their ComiXology account and to download the new app to continue reading. The new app is entitled Comics – Read Comic Books & Graphic Novels by comiXology. If users resist updating the app you will still be able to read your issues for a limited time, but will be disabled soon. The Marvel and DC Comics apps, which are powered by ComiXology, appear to be unaffected. Amazon must have looked at Comixology’s books and realized how much money Apple was making on each comic purchase. Whenever someone buys a single issue Apple nets 30% of each transaction. When Apple originally implemented this policy Amazon immediately disabled the ability to buy eBooks via their own iOS apps. Phasing out Apple will put more money into the Comixology, Amazon and the publishers pockets. ComiXology hopes to “ease this transition” by offering a $5 credit to comiXology users, which will automatically be applied to accounts today. Customers using the Android Comics app can still purchase comics through it, but now it will be through a new comiXology in-app purchase system rather than through Google Play. Comixology Disables Purchases on iOS is a post from: Good e-Reader |
How to Dispose of a Broken or Dead Kindle for Cash
| So I’ve already posted articles about what to do if your Kindle is ever lost or stolen, along with how to fix a frozen or unresponsive Kindle or a Kindle with wireless issues. But what do you do with a Kindle that is totally broken and nonfunctional? You might be surprised to find out that […] |
URL: http://feeds.the-ebook-reader.com/~r/feedburner/cmWU/~3/NsFRxJZgR68/
New Star Wars eBooks to Focus on Canon
| The Secondary film unit for the new Star Wars Episode 7 is currently underway in the Abu Dhabi desert, The movie will be released late next year and there are 4 new eBooks under development seeking to rewrite the expanded universe. Lucasfilm and Disney Publishing have admitted that the existing expanded universe no long happened. Any of the books or comics that transpired after Return of the Jedi are not considered canon. This was done to provide the filmmakers with a maximum amount of creative freedom in making Episode 7. “In order to give maximum creative freedom to the filmmakers and also preserve an element of surprise and discovery for the audience, Star Wars Episodes VII-IX will not tell the same story told in the post-Return of the Jedi Expanded Universe,” says the official announcement on Starwars.com. Timothy Zahn was best known for his trilogy of books after Return of the Jedi. Heir to an Empire which focused on Grand Admiral Thrawn and Lukes future wide Mara Jade are no longer considered canon. It is up for debate if the entire Old Republic timeline is null and void as well. There are currently over 17,000 characters in the Expanded Universe that will forever be purged. This might be a mixed blessing because four new titles that been announced that will abide by the official canon of Lucasfilm and Disney. Del Rey Books will be publishing the new titles that starts with Star Wars: A New Dawn, by bestselling author John Jackson Miller. Set prior to the events of the forthcoming animated series Star Wars Rebels, this novel tells the story of how two of the lead characters of the series, Kanan Jarrus and Hera Syndulla, came to cross paths. To tell this important backstory, Miller benefited from contact with series executive producers Dave Filoni, Simon Kinberg and Greg Weisman, who together ensured this tale will be part of the Star Wars canon of storytelling going forward. It is scheduled for hardcover and eBook release on September 2, 2014. The next book to be issued is called STAR WARS: TARKIN by James Luceno and is slatted for a November 4th release date. This will be followed by STAR WARS: HEIR TO THE JEDI in January 2015 and STAR WARS: LORDS OF THE SITH by Paul Kemp in March 2015. Aside from Star Wars Rebels, the new books will likely focus on major characters that will take part in Episode 7 and set the stage for the movie. Given that this is official canon we can draw parallels between the books and the movies.
New Star Wars eBooks to Focus on Canon is a post from: Good e-Reader |
Friday, April 25, 2014
Microsoft Surface Mini Waiting in the Wings
| Microsoft has a smaller version of their Surface tablet waiting in the wings. This will allow it to be more pocket friendly and make it a viable e-reader for those of us on the go. Will the Surface Mini be a hit? The Microsoft Surface Mini was first tipped in an Amazon product page for a protective case. There has been consistent rumors for the last year surrounding the new product that was originally tipped for an official annoucnement in May 2014. The Surface Mini is thought to be seven to eight inches in size. One of the big hyping factors regarding this new device is the active digitizer Pen that will replace the capacitive one that shipped with the Surface 1 and 2. Microsoft recently shed some of the bulky file size with Windows 8.1. The more lightweight operating system will allow tablets to get more bang for their buck with storage memory. One of the big selling points behind the Surface Mini should be the Microsoft Reader app the company is developing. MS has mandated that Barnes and Noble discontinue support for their own app and throw their development might towards Microsoft’s upcoming product. There will be millions of books, newspapers and magazines available to purchase and also allow customers to open up their own eBooks and PDF files. The Microsoft Surface Mini could be a compelling enough product if the price is right. In the past all of the Windows 8 tablets have been horribly overpriced and hinder mass market acceptance. A recent Gartner report done in 2013 stated that 195 million tablets were sold and Microsoft only accounted for 2.1%. Microsoft Surface Mini Waiting in the Wings is a post from: Good e-Reader |
Roundtable – Blackberry 10 or Windows Mobile?
| Welcome to another Good e-Reader Roundtable discussion with Michael and Peter. Today the two lads discuss the overall merits between Blackberry 10 and Windows Phone 8. Michael and Peter have been using these operating systems for years. Michael started with the original Blackberry Pearl and had every single phone until Blackberry 10 came out. One of the downfalls of the new OS is the elimination of the Blackberry Internet Service which abandons solid encryption and data compression, resulting in higher roaming fees. Peter has had over 5 different Windows phones over the years and has seen the OS really change. Roundtable – Blackberry 10 or Windows Mobile? is a post from: Good e-Reader |
PW Interprets Print Sales Data
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That fact isn’t helped by policies among many retailers and publishers to not divulge specific sales numbers, as evidenced by the numerous attempts to ask companies like Amazon or Barnes and Noble to reveal their sales figures. But today, an article by Gabe Habash featured in Publisher’s Weekly provides some very insightful speculation into what kind of sales figures produce a bestseller. According to the highly involved metrics from one specific title, PW discovered, “By studying the print bestseller list for a two-week period, we were able to determine that a title in Amazon's top five averages 1,094 print copies sold across all channels, including other retailers, on a typical day. And because the general industry thinking is that Amazon accounts for about 30% of print sales, that means it likely takes around 300 copies per day to reach Amazon's top five, depending on the day of the week and the time of year.” While this data only relates to book sales that are reported to Nielsen Book Scan, PW estimated to include those retailers that are not reporting, and to include ebooks. A correction on the article appeared later which stated, “We incorrectly calculated the total of books sold per week (including outlets not tracked by Amazon) as 7,353; its per day total average as 1,050 and its Amazon estimate as 315 per day.” Despite the numerical discrepancy, the article provides a somewhat less murky look at what is behind the rankings and looks at actual sales numbers, an area of concern for a great number of authors. Interestingly, access to data is one chief area where self-published authors have a slight advantage over their traditionally published peers; sales data for most online retailers is updated at least hourly, whereas most traditionally published authors wait for quarterly sales reports from their publishers which are usually prepared one quarter behind. That means an author will discover in June how many books he sold in January through March. What still bemuses these authors is how little books are sold while still correlating to a sales ranking. Depending on how other titles in a similar category sell, a single unit sale can result in a tremendous increase in rank. Add to that the exponential increase that comes from a few hundred sales, and the rankings start to make less and less sense.
PW Interprets Print Sales Data is a post from: Good e-Reader |
Audubon Field Guides Sale; 12 Free Music Apps ($40 Value)
| I was browsing the Deals & Freebies section at MobileRead this morning and came across a couple of really good promotions going on right now that are definitely worth sharing. First up, Audubon field guides are on sale for 99 cents each at Amazon and iTunes until May 1st. I have a few of them […] |
URL: http://feeds.the-ebook-reader.com/~r/feedburner/cmWU/~3/WFdMSsbj6Ks/
Samsung Galaxy Tab 4 Tablets Get Pricing and Release Date
| Samsung’s somewhat puzzling line of new mid-level Android tablets will be released in less than a week, on May 1st to be specific. All three Galaxy Tab 4 tablets are already available for pre-order from Samsung and Amazon starting at $199 for the 7-inch model, up to $349 for the 10-inch. Samsung first unveiled their […] |
URL: http://feeds.the-ebook-reader.com/~r/feedburner/cmWU/~3/LOvqM_pSCDY/
Kobo Lays Off 63 People, Roughly 15% of Staff
| There’s a lot of change going on at Kobo this year. They’ve been shuffling upper management positions and they appointed a new president and CEO a few weeks ago. Now Kobo’s new leadership has elected to let go 63 workers. Kobo employs over 400 people worldwide, so that equates to about a 15% reduction in […] |
URL: http://feeds.the-ebook-reader.com/~r/feedburner/cmWU/~3/dK7EWS1Lz7c/
Young readers rejoice! A place all their own.
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Once inside the eReading Room, all searches will show only juvenile or young adult content. No adult content will appear in the search results. All titles in the eReading Room are also cataloged by reading level, AT scores and other reading metrics to help parents and teachers select titles to aid in literacy campaigns. All titles can be sampled in OverDrive Read prior to borrowing or placing a hold. Cuyahoga County Public Library has already added a safe site for their Kids and Teens to browse and checkout material, as have several other library partners.To get started, contact your Collection Development Specialist. When your Kids' and Teens' eReading Room is live, we'll add web graphics to your main OverDrive-powered website to link to the eReading Room and provide promotional resources. Parents can feel comfortable knowing their children are browsing and borrowing books that are age, grade, and reading level appropriate.
Laura Guldeman is a Collection Development Analyst at OverDrive. |
URL: http://feedproxy.google.com/~r/DigitalDistributionBlogOverdrive/~3/eXdsFy1ubFQ/
PiPhone – home-made Raspberry Pi smartphone
| Dave Hunt‘s been at it again. Here’s his latest: a home-made smartphone based around a Raspberry Pi. It’s smaller than many of the phones I’ve owned, and it’s cheaper than the phone that’s currently in my pocket, with a parts list coming in at only $158. The PiPhone is built entirely from off-the-shelf kit, so there’s no soldering required, and no fiddly electronics work. I’ll let Dave introduce it to you. The PiPhone is a remarkably simple build, with a Sim900 GSM/GPRS module (which you can slip a SIM card into – you’ll still have to pay for your calls) talking to the network and doing the heavy communications lifting (making calls, and hanging up; sending texts and dealing with data); an on/off switch, a converter to make the LiPoly battery output 5 volts, and one of Adafruit’s tiny TFT monitors. You’ll find a typically thorough writeup on Dave’s website, with a parts list (he sourced everything from Adafruit and eBay), although he hasn’t uploaded the code, which he currently considers a bit hacky, to GitHub yet; please do, Dave, because we’d like to have a play! For those of you who do not want your phones crammed with Apple, Google or Microsoft software (Jonathan Bell, one of our engineers, still hauls around a Nokia 1600 for that reason – and because the thing’s basically unbreakable), or who want the satisfaction of making one yourself, this is the perfect project. Thanks (again) Dave! |
Self-Publishing: How Good Is Good Enough?
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In many critics’ minds, traditional publishing still stands as the much-needed gatekeeper, or the “filter,” as an industry expert put it at the recent PubSmartCon event in Charleston. Without that filter in place, the waters of bookselling will get muddied by the debris that manages to work its way in. But in the case of many authors who’ve left traditional publishing behind for one reason or another, self-publishing is the only route to give their existing fan base more of what they want. Author and professional biographer Larry Grobel has around a dozen traditionally published and bestselling titles to his credit. Some of his more notable works include the authorized biographies of Marlon Brando, Al Pacino, Truman Capote, and Barbara Streisand. Over the course of his long career as both a biographer and a journalist, Grobel compiled countless pages of transcripts of conversation with notable people, and took own original photographs in the process. But when he approached his long-time publisher with his completed book about this career, You Show Me Yours: A Writer’s Journey from Brooklyn to Hollywood, he was told what many authors have blatantly been told by the industry: “Call us after you sell 100,000 ebooks, we’ll pick it up.” As Grobel’s work is considered to be memoir and the industry is notoriously reluctant to publish anyone’s life story, it was deemed not worth the investment (this is despite the fact the author’s book is filled with information, conversations, and unpublished photographs of his subjects that he owns the copyright to, which would be considered industry gold to some). Once Grobel could demonstrate an audience for the book by selling it himself, then the publisher would deign to take over. Grobel’s reason for self-publishing is far from isolated, unfortunately. As bookstores close and discovery becomes difficult, an already hard-to-break-into industry has become even more wary of investing in new titles. But it still begs the question: is his self-published book unworthy because of its status? Is the author not already a bestselling writer and a respected veteran in his genre? So what would cause bookstores to refuse to stock it, and newspapers (many of whom Grobel has probably contributed to over his astounding career) to refuse to review it? The online community became incensed this week when Smashwords’ CEO and founder Mark Coker posted his Indie Author Manifesto, supporting the belief that every book deserves the opportunity to be placed in front of readers. And while critics of that idea took to social media to complain that this belief is part of the downfall of publishing, what is even more likely to destroy books is having a single entity decide for readers that certain books just don’t need to be published.
Self-Publishing: How Good Is Good Enough? is a post from: Good e-Reader |
Top 10 Android Apps of the Week – April 25 2014
| This week we look at a number of the top apps and games to hit the Good e-Reader Android App Store! There are some real gems from many different genres. PAC-MAN MONSTERS – One of the most beloved video game heroes PAC-MAN is back in mobile games in this simple free-to-play puzzler! BodBot – Personal Trainer – BodBot will personalize your exercise and nutrition to you. It will tailor to your goal, schedule, available equipment, exercise history, and it will adapt based on your progress. Confide – Confide is your off-the-record messenger. We combine end-to-end encryption with disappearing and screenshot-proof messages to foster genuine, unfiltered, and efficient communication. IFTTT – Put the internet to work for you. IFTTT lets you create powerful connections with one simple statement — if this then that. Activate your Channels and create Recipes on IFTTT! Channels are services like Facebook, Gmail, Twitter, as well as devices like Philips Hue, Belkin WeMo, and UP by Jawbone. Sonic Racing Transformed – Race as Sonic and a host of legendary All-Stars and prepare to transform! Speed across land, sea and air in a high velocity battle to the finish line, as your amazing transformable vehicle changes from car to boat to plane mid-race. Racing on mobile will never be the same again! Undead Slayer Extreme SEA – All the infamous villains from the Chinese dynasty are ready to take action. Only the chosen one can slay the zombie warriors and reconstruct the fallen kingdom. Zombie Age 2 – The fence has fallen down again, one after the other, no matter how many zombies you have killed. The town is now overrun by the walking dead, and everyone around you had turned into meat. You've come to realize that you can no longer defend in the house since the zombies are getting more enraged while the supply is running out. It's time to load up the gun and shoot your way out! Newsbeat – Personalized Radio – With Newsbeat, you can pick the news that you want to hear – from a large collection of high quality, trusted, local publications, as well as national news organizations. Battleship X – Battleship X is a 3D shooting game! Highly addictive. Mountain Sniper Shooting 3D – The beautiful mountain range, which was a key tourist attraction is now taken over by enemy forces. The authorities of the area is sick of their weird ideas about the mountains and its habitat. They are looking for a brave and smart sniper, who is willing to take all the necessary risk, and make full use of his sniping skills in this hilly tourist resort to finish this problem once and for all. Top 10 Android Apps of the Week – April 25 2014 is a post from: Good e-Reader |
Thursday, April 24, 2014
European Libraries Flounder in the Digital Age
| Libraries in the United States have faced monumental challenges to get publishers to buy into the idea of allowing their digital books to be distributed. The American Library Association has been a tireless vanguard in convincing the big five publishers to opt into pilot projects and then unilateral adoption. Things are very different in Europe, but a new initiative called “Right to E-Read” seeks to build awareness. The The European Bureau of Library, Information and Documentation Associations has launched the “Right to E-Read” campaign all over Europe. The premise the new program is a hardcore marketing campaign with posters, videos, postcards and promotional materials to build awareness to the public on the fact they can borrow eBooks from the library and the limitations facing them. The situation facing Europe is the same one that transpired in the US a few years ago. There are no consistent licensing terms for libraries to purchase eBooks and many publishers have yet to opt into the idea that distributing their digital content does not devalue the product. Barbara Stripling, president of the American Library Association weighed in on Right to E-Read “The "ebook" problem is all too familiar to ALA and U.S. libraries, so we empathize with our European colleagues. Our approach to getting more ebooks in U.S. libraries involved engaging in direct discussions with publishers, in addition to demonstrating that library eBook lending enhances overall eBook sales. Through many means of connecting authors and readers, libraries help the public discover and enjoy books from the broad range of authors. EBLIDA President, Klaus-Peter Böttger, declared that “Libraries (and public libraries in particular) have a major public interest mission in developing a strong and vibrant reading culture that forms nations of readers and a Europe of readers”. He added that “this library mission is entirely in the interest of the public and the market. It is time for other stakeholders in the e-book market to clearly acknowledge the important role of libraries in developing a reading culture which actively fosters the sale of books and eBooks”. I remain apprehensive that this program will have any immediate effects in the European library scene. Europe has many more publishers then the US does and there are cultural and language barriers preventing extensive dialog. EBLIDA also does not have the clout that ALA has in the US in dealing with publishers and fostering relationships. The big players in eBook distribution to libraries in the US, is non-extinct in Europe. Overdrive, 3M, Axis 360, Ingram, Smashwords and many other companies have no presence in Europe, other than Overdrives meager offerings in Ireland and the UK. You simply don’t have any big for-profit companies investing big bucks in lobbying the publishers and government for changes. The right to E-Read if anything might build slight awareness to the public. This is a good PR campaign for the library body promoting it and will net them a ton of headlines in the media. Sadly, this will not have any cohesive effect. The UK has been running study after study for years and even the government is trying to mandate eBooks in libraries, but so far nothing of real substance has been done. European Libraries Flounder in the Digital Age is a post from: Good e-Reader |
Facebook Appeals to Journalists with FB Newswire
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Post by FB Newswire. Facebook just launched a news service called FB Newswire. It is designed to give writers, journalists and news companies a way to stay in touch with trending and developing stories. The company hopes to mirror how Twitter has become a global news service, that breaks stories before anyone else. FB Newswire content will come from two sources. The main one is Storyful, a social-news service that News Corp. acquired in December for $25 million. As a Facebook post by Andy Mitchell describes it, the service will highlight content that has been posted by users and media entities who are reporting on breaking news events around the world, and comes complete with an easy-to-use "embed" function. The second source of news stories will be sourced by users status updates that link to a 3rd party news website. The Facebook algorithms will incorporate video, pictures and headlines. Users will be able to embed the stories, with special code, similar to how Twitter handles embedded Tweets. The sole premise of this initiative is to give journalists and news companies the ability to trust the sources. This is why the vast majority of it will come from confirmed companies like Storyful. FB Newswire is accessible on Facebook at Facebook.com/FBNewswire and on Twitter at @FBNewswire, and will be updated in real-time with content related to top news stories. Facebook Appeals to Journalists with FB Newswire is a post from: Good e-Reader |
Breaking: Kobo Makes Organizational Changes in Toronto
| Kobo is based in Toronto Canada and the company today axed over 60 jobs. They also reshuffled existing employees into different departments in a bid to refocus on e-readers and their line of apps. Currently Kobo employees over 500 people worldwide, from executives to agents. In a statement today to Good e-Reader, Kobo said “To focus resources on innovation, partners, and readers, the leadership team has realigned the organization's structure, which has also meant some staff reductions. As part of this change, teams have been restructured and optimized; redeploying employees to best use their skills to support the company's core goal of providing the best global eReading experience. All our offices will continue to operate as usual, with a mandate to grow the business in each of our territories. While these decisions are never easy, we believe that we have the structure that puts us in the best position possible to aggressively compete in an ever-challenging global marketplace. By ensuring the Kobo team is lean and agile, we will be able to strengthen our business position and continue our trajectory of global growth. Kobo's mission remains to lead the global transformation in reading by inspiring people to read more and more often – anytime, on any device, anywhere around the world.” The Canadian based e-Reader company did not mention whether these dismissals were on the executive level, junior or both. Many industry experts are surmising that this is partly due to the new President Michael Tamblyn and new CEO Takahito Aiki. Likely some of the old guard has been let go and the two executives are trying to surround themselves with people who have the same vision as they do. Breaking: Kobo Makes Organizational Changes in Toronto is a post from: Good e-Reader |
Vectors from coarse motion estimation
| Liz: Gordon Hollingworth, our Director of Software, has been pointing the camera board at things, looking at dots on a screen, and cackling a lot over the last couple of weeks. We asked him what he was doing, so he wrote this for me. Thanks Gordon! The Raspberry Pi is based on a BCM2835 System on a Chip (SoC), which was originally developed to do lots of media acceleration for mobile phones. Mobile phone media systems tend to follow behind desktop systems, but are far more energy efficient. You can see this efficiency at work in your Raspberry Pi: to decode H264 video on a standard Intel desktop processor requires GHz of processing capability, and many (30-40) Watts of power; whereas the BCM2835 on your Raspberry Pi can decode full 1080p30 video at a clock rate of 250MHz, and only burn 200mW. Because we have this amazing hardware it enables us to do things like video encode and decode in real time without actually doing much work at all on the processor (all the work is done on the GPU, leaving the ARM free to shuffle bits around!) This also means we have access to very interesting bits of the encode pipeline that you’d otherwise not be able to look at. One of the most interesting of these parts is the motion estimation block in the H264 encoder. To encode video, one of the things the hardware does is to compare the current frame with the previous (or a fixed) reference frame, and work out where the current macroblock (16×16 pixels) best matches the reference frame. It then outputs a set of vectors which tell you where the block came from – i.e. a measure of the motion in the image. In general, this is the mechanism used within the application So over the last few weeks I’ve been trying to get the vectors out of the video encoder for you, and the attached animated gif shows you the results of that work. What you are seeing is the magnitude of the vector for each 16×16 macroblock equivalent to the speed at which it is moving! The information comes out of the encoder as side information (it can be enabled in Since this represents such a small amount of data, it can be processed very easily which should lead to 30fps motion identification and object tracking with very little actual work! Go forth and track your motion! |