Apple granted digital video encoding patent
TweetFollow Us on Twitter

Apple granted digital video encoding patent

Apple has been granted a patent (number 7903730) by the US Patent & Trademark Office for a method and apparatus for variable accuracy inter-picture timing specification for digital video encoding. It relates to the field of multimedia compression systems. In particular the present invention discloses methods and systems for specifying variable accuracy inter-picture timing.

Specifically, the present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture and a nearby video picture is determined. The display time difference is then encoded into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture. For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted. The inventors are Barin Geoffry Haskell, David William Stinger, Andriana Dumitras and Atul Puri.

Here's Apple's background and summary of the invention: "Digital based electronic media formats are finally on the cusp of largely replacing analog electronic media formats. Digital compact discs (CDs) replaced analog vinyl records long ago. Analog magnetic cassette tapes are becoming increasingly rare. Second and third generation digital audio systems such as Mini-discs and MP3 (MPEG Audio-layer 3) are now taking market share from the first generation digital audio format of compact discs.

"The video media has been slower to move to digital storage and transmission formats than audio. This has been largely due to the massive amounts of digital information required to accurately represent video in digital form. The massive amounts of digital information needed to accurately represent video require very high-capacity digital storage systems and high-bandwidth transmission systems.

"However, video is now rapidly moving to digital storage and transmission formats. Faster computer processors, high-density storage systems, and new efficient compression and encoding algorithms have finally made digital video practical at consumer price points. The DVD (Digital Versatile Disc), a digital video system, has been one of the fastest selling consumer electronic products in years. DVDs have been rapidly supplanting Video-Cassette Recorders (VCRs) as the pre-recorded video playback system of choice due to their high video quality, very high audio quality, convenience, and extra features. The antiquated analog NTSC (National Television Standards Committee) video transmission system is currently in the process of being replaced with the digital ATSC (Advanced Television Standards Committee) video transmission system.

"Computer systems have been using various different digital video encoding formats for a number of years. Among the best digital video compression and encoding systems used by computer systems have been the digital video systems backed by the Motion Pictures Expert Group commonly known by the acronym MPEG. The three most well known and highly used digital video formats from MPEG are known simply as MPEG-1, MPEG-2, and MPEG-4. VideoCDs (VCDs) and early consumer-grade digital video editing systems use the early MPEG-1 digital video encoding format. Digital Versatile Discs (DVDs) and the Dish Network brand Direct Broadcast Satellite (DBS) television broadcast system use the higher quality MPEG-2 digital video compression and encoding system. The MPEG-4 encoding system is rapidly being adapted by the latest computer based digital video encoders and associated digital video players.

"The MPEG-2 and MPEG-4 standards compress a series of video frames or video fields and then encode the compressed frames or fields into a digital bitstream. When encoding a video frame or field with the MPEG-2 and MPEG-4 systems, the video frame or field is divided into a rectangular grid of macroblocks. Each macroblock is independently compressed and encoded.

"When compressing a video frame or field, the MPEG-4 standard may compress the frame or field into one of three types of compressed frames or fields: Intra-frames (I-frames), Unidirectional Predicted frames (P-frames), or Bi-Directional Predicted frames (B-frames). Intra-frames completely independently encode an independent video frame with no reference to other video frames. P-frames define a video frame with reference to a single previously displayed video frame. B-frames define a video frame with reference to both a video frame displayed before the current frame and a video frame to be displayed after the current frame. Due to their efficient usage of redundant video information, P-frames and B-frames generally provide the best compression.

"A method and apparatus for variable accuracy inter-picture timing specification for digital video encoding is disclosed. Specifically, the present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture and a nearby video picture is determined. The display time difference is then encoded into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture.

"For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted."

-- Dennis Sellers

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Typinator 7.4 - Speedy and reliable text...
Typinator turbo-charges your typing productivity. Type a little. Typinator does the rest. We've all faced projects that require repetitive typing tasks. With Typinator, you can store commonly used... Read more
Fantastical 2.4.5 - Create calendar even...
Fantastical 2 is the Mac calendar you'll actually enjoy using. Creating an event with Fantastical is quick, easy, and fun: Open Fantastical with a single click or keystroke Type in your event... Read more
Monosnap 3.4.9 - Versatile screenshot ut...
Monosnap lets you capture screenshots, share files, and record video and .gifs! Features Capture Capture full screen, just part of the screen, or a selected window Make your crop area pixel... Read more
Skim 1.4.32 - PDF reader and note-taker...
Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF, but is also great for viewing any PDF file. Skim includes many features and has a... Read more
ForkLift 3.1.1 - Powerful file manager:...
ForkLift is a powerful file manager and ferociously fast FTP client clothed in a clean and versatile UI that offers the combination of absolute simplicity and raw power expected from a well-executed... Read more
Direct Mail 5.2.1 - Create and send grea...
Direct Mail is an easy-to-use, fully-featured email marketing app purpose-built for macOS. Create, send, and track great looking email campaigns that get results. Start your newsletter by selecting... Read more
Direct Mail 5.2.1 - Create and send grea...
Direct Mail is an easy-to-use, fully-featured email marketing app purpose-built for macOS. Create, send, and track great looking email campaigns that get results. Start your newsletter by selecting... Read more
Skim 1.4.32 - PDF reader and note-taker...
Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF, but is also great for viewing any PDF file. Skim includes many features and has a... Read more
ForkLift 3.1.1 - Powerful file manager:...
ForkLift is a powerful file manager and ferociously fast FTP client clothed in a clean and versatile UI that offers the combination of absolute simplicity and raw power expected from a well-executed... Read more
MarsEdit 4.0.5 - Quick and convenient bl...
MarsEdit is a blog editor for OS X that makes editing your blog like writing email, with spell-checking, drafts, multiple windows, and even AppleScript support. It works with with most blog services... Read more

Latest Forum Discussions

See All

Programmer of Sonic The Hedgehog launche...
Japanese programmer Yuji Naka is best known for leading the team that created the original Sonic The Hedgehog. He’s moved on from the speedy blue hero since then, launching his own company based in Tokyo – Prope Games. Legend of Coin is the... | Read more »
Why doesn't mobile gaming have its...
The Overwatch League is a pretty big deal. It's an attempt to really push eSports into the mainstream, by turning them into, well, regular sports. But slightly less sweaty. It's a lavish affair with teams from all around the world, and more... | Read more »
Give Webzen’s new billiard game PoolTime...
Best known for producing hugely popular MMO titles, South Korean publisher Webzen is now taking aim at a different genre altogether. PoolTime is a realistic eight ball pool simulator, allowing you to compete in real-time matches against players... | Read more »
Let Them Come Guide - How to survive aga...
Let Them Come is all about making it as far as possible against overwhelming odds. Check out some of these tips to help you last a little longer in your unwinnable fight: [Read more] | Read more »
All the best games on sale for iPhone an...
Happy last day of the week. I hope you've been having a good one. I have. I saw ten doggos today. So because I'm in a good mood, I thought I'd round up all of the best games that are currently on sale on the App Store. [Read more] | Read more »
The very best games that came out for iP...
We're getting to the end of the first real, full, proper week of 2018. And in that time we've seen some pretty awesome games landing on the App Store. Of course, we've seen some absolute duffers as well. The sort of games that you look at and... | Read more »
Rusty Lake Paradise (Games)
Rusty Lake Paradise 1.4 Device: iOS Universal Category: Games Price: $2.99, Version: 1.4 (iTunes) Description: Jakob, the oldest son of the Eilander family, is returning to Paradise island after his mother passed away. Since her... | Read more »
Antihero Guide - Sneaky tricks to get ah...
Games of Antihero start out small and streamlined, but they quickly turn into long strategic conquests as you fight for control of the Victorian-era streets. If you find yourself struggling in the skullduggery department, here are a few things you... | Read more »
Here's why Niantic pulling Pokemon...
If there's one thing that Pokemon GO did well, it was bringing people together. I still remember seeing groups of people around the marina near where I live in the weeks after the game came out, all of them trying to grab some water Pokemon. There... | Read more »
Let Them Come (Games)
Let Them Come 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: | Read more »

Price Scanner via MacPrices.net

Apple refurbished Mac minis available startin...
Apple has restocked Certified Refurbished Mac minis starting at $419. Apple’s one-year warranty is included with each mini, and shipping is free: – 1.4GHz Mac mini: $419 $80 off MSRP – 2.6GHz Mac... Read more
Amazon offers Silver 13″ Apple MacBook Pros f...
Amazon has new Silver 2017 13″ #Apple #MacBook Pros on sale today for up to $150 off MSRP, each including free shipping: – 13″ 2.3GHz/128GB Silver MacBook Pro (MPXR2LL/A): $1199.99 $100 off MSRP – 13... Read more
Sale: 12″ 1.3GHz MacBooks on sale for $1499,...
B&H Photo has Space Gray and Rose Gold 12″ 1.3GHz #Apple MacBooks on sale for $100 off MSRP. Shipping is free, and B&H charges sales tax for NY & NJ residents only: – 12″ 1.3GHz Space... Read more
Apple offers Certified Refurbished 2017 iMacs...
Apple has a full line of Certified Refurbished iMacs available for up to $350 off original MSRP. Apple’s one-year warranty is standard, and shipping is free. The following models are available: – 27... Read more
13″ MacBook Airs on sale for $120-$100 off MS...
B&H Photo has 2017 13″ 128GB MacBook Airs on sale for $120 off MSRP. Shipping is free, and B&H charges sales tax for NY & NJ residents only: – 13″ 1.8GHz/128GB MacBook Air (MQD32LL/A): $... Read more
15″ Touch Bar MacBook Pros on sale for up to...
Adorama has Space Gray 15″ MacBook Pros on sale for $200 off MSRP. Shipping is free, and Adorama charges sales tax in NJ and NY only: – 15″ 2.8GHz MacBook Pro Space Gray (MPTR2LL/A): $2199, $200 off... Read more
21″ 3.4GHz 4K iMac on sale for $1399, $100 of...
Adorama has the 21″ 3.4GHz 4K #Apple #iMac on sale today for $1399. Their price is $100 off MSRP. Shipping is free, and Adorama charges sales tax in NJ and NY only: – 21″ 3.4GHz 4K iMac (MNE02LL/A... Read more
B&H offering 13″ Apple MacBook Pros for u...
B&H Photo has 13″ MacBook Pros on sale for up to $75-$120 off MSRP. Shipping is free, and B&H charges sales tax for NY & NJ residents only: – 13-inch 2.3GHz/128GB Space Gray MacBook Pro (... Read more
B&H continues to offer clearance 2016 15″...
B&H Photo has clearance 2016 15″ #MacBook Pros available for up to $800 off original MSRP. Shipping is free, and B&H charges NY & NJ sales tax only: – 15″ 2.7GHz Touch Bar MacBook Pro... Read more
The cheapest 15″ Apple MacBook Pro available...
B&H Photo has the 15″ 2.2GHz MacBook Pro available for $200 off MSRP including free shipping plus NY & NJ sales tax only: – 15″ 2.2GHz MacBook Pro (MJLQ2LL/A): $1799 $200 off MSRP Apple has... Read more

Jobs Board

*Apple* Retail - Multiple Positions - Apple,...
Job Description:SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Site Reliability Engineer, *Apple* Pay - Ap...
# Site Reliability Engineer, Apple Pay Job Number: 113356036 Santa Clara Valley, California, United States Posted: 12-Jan-2018 Weekly Hours: 40.00 **Job Summary** Read more
UI Tools and Automation Engineer, *Apple* M...
# UI Tools and Automation Engineer, Apple Media Products Job Number: 86351939 Santa Clara Valley, California, United States Posted: 11-Jan-2018 Weekly Hours: 40.00 Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
UI Tools and Automation Engineer, *Apple* M...
# UI Tools and Automation Engineer, Apple Media Products Job Number: 113136387 Santa Clara Valley, California, United States Posted: 11-Jan-2018 Weekly Hours: 40.00 Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.