What are I-Frames (IDRs) and how are they used?

I-frames (intra-coded frame) play a very important role in video compression and in this article, we shall see why exactly. Unlike the P-frame (predictive-coded frame), which codes only the differences from the previous frame, and the B-frame (bi-predictively coded frame), which codes the differences from both the previous and following frames, the I-frame itself is coded as if it were an individual complete image. Read more about B-frames and P-frames that we wrote earlier. The I-frame doesn't refer to other frames for information, and because of this feature, it plays a critical role in video compression. They are found in video codecs like...

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What are B-Frames and how are they used?

B-frames are a unique type of frame used in video codecs. They are found in video compression formats like H.264/AVC, HEVC, and AV1. You can think of them as helping to define the intermediate state of frames in a sequence. They contribute a lot to reducing the size of video files. However, if they do their job poorly, they can reintroduce visual artifacts, leading to a subpar experience for the viewer. So, their correct implementation is of the utmost importance.B-frames make use of information from both the previous and next frames in the Group of Pictures (GOP) to achieve highly...

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What is WebP Image Compression?

The WebP image format, developed by Google, can offer better compression and quality for images on web pages compared with other current image formats. WebP is another image format similar to AVIF and JPEG-LI. It is designed to enable small size files while maintaining the image quality, so that it is suitable for loading a web page faster and providing economical image storage. Both these are very important for image heavy websites like Pinterest, or e-commerce websites like Amazon, Shopify, eBay, Etsy, etc. WebP supports both lossy and lossless compression. In the lossless mode, the compressed image contains all the original data,...

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What is VBR or Variable Bitrate in Video Compression?

While compressing a video, one needs to do a lot of work and tuning to achieve a balance between video quality and file size. One of the important parameters in the video compression process is "rate control" and this specifies how the video is compressed and how the "bit budget" is distributed across a video. One of the rate control techniques is VBR (Variable Bitrate) rate control that offers a nice trade-off between quality and bitrate (filesize) for a video. A very common form of rate control is CBR (Constant Bitrate) encoding. It divides the video file into a number of segments...

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What is JPEG-LI?

For years, the JPEG (Joint Photographic Experts Group) format has been the standard for digital image storage and sharing. But JPEG's method of compression often forces a choice between image quality and file size. However, there is a new image coding format called JPEG-LI that could change the way we store and send visual information. JPEG-LI is a coding library created by Google that aims to improve the traditional JPEG compression by a large margin. Maintaining compatibility with existing JPEG viewers and programs, JPEG-LI provides compression that halves the size of the JPEG guise while retaining image quality.There are a few...

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What is Stereoscopic Video?

Stereoscopic video, also called 3D video, brings viewers into a world beyond the flat screen. Instead of presenting an image moving on a flat screen (like a normal 32" or "43" inch TV would), stereoscopic video creates depth and we humans experience this depth through depth perception in our natural vision. By presenting slightly different video feeds to each eye, stereoscopic video re-creates the 3-D perception on a flat screen, and gives us very realistic three dimensional images that can be viewed without any special eyeglasses!Depth perception comes naturally for humans and its one of the prime reasons that we've survived and...

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MV-HEVC for Apple Vision Pro Virtual Reality

What is MV-HEVC (Multiview High Efficiency Video Coding)?

The whole world really loves entertainment. Across the globe, people constantly search for new and exciting things. They are just dying to find new ways to be caught up in a story and new opportunities to make themselves a part of the story. Think of Pokemon Go, app-based watch parties, multi-angle video capture of sporting events, and The Sphere in Las Vegas. There's undoubtedly innovation happening on both the demand and supply side! People nowadays don't find it enough to see a movie’s plot progress - they want to become part of the story themselves! People seek a more profound relationship with...

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What is 1080p?

1080p is a video quality standard (one of the highest resolutions in HD video rendering) characterized by the display resolution of 1920 pixels wide by 1080 pixels tall. The term 1080p usually assumes a widescreen aspect ratio of 16:9, implying a horizontal (display) resolution of 1920 pixels. 1080p is also called FHD or Full HD and is classified as an HD resolution because it displays at least 720 vertical lines, meaning that horizontal resolution is displayed well above the 1920 pixels displayed vertically. You can see this resolution being used in mediums such as mobile phones, gaming consoles, Smart TVs, browsers, and...

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What is GOP (Group-of-Pictures) In Video Compression?

GOP stands for Group of Pictures. In the field of video compression, a Group of Pictures (GOP) is a fundamental unit that determines the way in which video frames are organized and arranged for efficient video encoding. Basically, instead of encoding video frames one after the other, multiple frames are grouped together to form a GOP (Group of Pictures) so that they can be compressed and then decompressed more efficiently. Understanding GOP structure is important for video editing, streaming, or any application, such as Visionular's where we optimize video compression within H.264/AVC, HEVC, and AV1 video codecs (what is a video codec?).What is...

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Jan Ozer interviews Zoe Liu at NAB 2024

Jan Ozer interviews Zoe Liu for OTTVerse

At the recently concluded NAB2024, video compression expert Jan Ozer caught up with our CTO and Co-Founder, Zoe Liu to talk to her about the latest in the world of AV1 video compression, Zoe's outlook on the use-cases, live-streaming, next big applications, and more! You can watch the entire video here.For video streaming businesses, AI-driven video compression isn't just a fad, it's a strategic advantage. In a competitive market, delivering high-quality videos efficiently is essential. AI-based compression makes both possible, giving businesses a clear edge. You can start a no-risk, free trial of Visionular's AI-driven video compression on the cloud today and...

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