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Bit depth enhancement for scalable video coding

A bit depth, coding technology, applied in the direction of digital video signal modification, television, electrical components, etc., can solve problems such as coding inefficiency

Inactive Publication Date: 2009-06-17
INTEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these techniques can be relatively inefficient from a coding perspective

Method used

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  • Bit depth enhancement for scalable video coding
  • Bit depth enhancement for scalable video coding
  • Bit depth enhancement for scalable video coding

Examples

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Embodiment Construction

[0014] refer to figure 1 , a conventional scalable video codec (SVC) system 10 includes a video source 20 that captures successive frames of image data to produce a video signal 21 whose pixel values ​​have a bit depth of M (a bit depth of ten, as a non-limiting example). That is, the video image captured by video source 20 has each pixel defined by a pixel value having M bits (ie, for each pixel, one M-bit pixel value per color space component).

[0015] SVC system 10 processes M-bit video signal 21 to produce encoded base-layer and enhancement-layer video streams. More specifically, to generate an encoded baseline video stream (referred to herein as “BL video stream 30 ”), SVC system 10 includes tone mapping unit 22 and baseline layer encoder 24 . From the M-bit video signal 21, the tone mapping unit 22 generates a lower bit depth signal (referred to as "N-bit video signal 23") having a bit depth of N(8) with a bit depth less than M, as a non-limiting example ) bit depth....

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Abstract

A video system includes an analyzer and a bit depth predictor. The analyzer receives a first coded video signal, which is indicative of first values for pixels. The first values are associated with a first bit depth. The analyzer, for each pixel, analyzes the first values for the pixels located in a neighborhood that contains said each pixel. The bit depth predictor, based at least in part on the analysis, generates a second coded video signal that is indicative of second values for the pixels. The second values are associated with a second bit depth that is different than the first bit depth.

Description

technical field [0001] The present invention relates to bit depth enhancement for scalable video coding. Background technique [0002] The present invention generally relates to bit depth enhancement for scalable video coding. [0003] A particular video can be viewed by many different viewers using many different devices and connections. For example, a particular Internet site can broadcast a video stream that can be viewed over a variety of wired and wireless networks, on mobile devices, desktop computers, and televisions, etc., with varying capabilities, connected to the site. To accommodate this different environment, a concept called scalable video coding can be employed. [0004] In scalable video coding, multiple layers of compressed video streams are provided, which allow each end device to extract the information matching the device's capabilities and ignore the rest. The compressed video stream can be encoded to accommodate a number of different scalable feature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCH04N19/00424H04N19/0089H04N7/26377H04N19/00442H04N7/26361H04N19/30H04N19/80H04N19/34
Inventor Y·-J·秋H·姜Y·-T·叶
Owner INTEL CORP
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