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Feedback based scalable video coding

一种编码、反馈消息的技术，应用在可缩放视频编码领域，能够解决没有办法确定NAL单元是否已经被截断、丢损等问题

Active Publication Date: 2010-08-04
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0050] Therefore, there is a problem that (Q1,n) may be lost during transmission
Also, when (Q1,n) includes a FGS segment, there is no way to determine whether the NAL unit has been truncated

Method used

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  • Feedback based scalable video coding
  • Feedback based scalable video coding
  • Feedback based scalable video coding

Examples

Experimental program
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Effect test

Embodiment Construction

[0058] figure 1 Denotes a general multimedia communication system for use in conjunction with the present invention. Such as figure 1 As shown, data source 100 provides source signals in analog, uncompressed digital, or compressed digital formats, or any combination thereof. The encoder 110 encodes the source signal into an encoded media bitstream. Encoder 110 may be capable of encoding multiple media types, such as audio and video, or multiple encoders 110 may be used to encode source signals of different media types. Encoder 110 may also take synthetically generated input, such as graphics and text, or may be capable of generating an encoded bitstream of synthetic media. In the following, to simplify the description, only one coded media bit stream of one media type is considered to be processed. It should be noted, however, that a typical real-time broadcast service includes multiple streams (usually at least audio, video and text subtitle streams). It should also be n...

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Abstract

A system and method provides a first integrity check code that can be calculated at an encoder and then sent to a decoder as a supplemental enhancement information message. The decoder can then calculate a second integrity check code over the actual received network abstraction layer units. This second integrity check code can be compared with the encoder-generated first integrity check code sentvia the supplemental enhancement information message to indicate if in fact all of the transmitted NAL units from which the integrity check code was generated have been received without changes in their content. In addition, an error tracking algorithm is provided that can be run at either the encoder or the decoder in order to determine if the network abstraction layer units are correct in content at the decoder level. Therefore, pictures that are sent as just intra coded frames and pictures that are sent as just inter coded frames can both be checked for errors. Hence, error checking can beprovided in those situations where the decoder fails to provide adequate information to the encoder as to what has actually been decoded.

Description

technical field [0001] The present invention generally relates to the field of scalable video coding. In particular, the invention relates to providing feedback through the use of integrity check codes. Background technique [0002] This section is used to provide a background or context for the invention to which the claims refer. The description herein may include enabling concepts, but these concepts have not necessarily been previously conceived or implemented. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by inclusion in this section. [0003] Video coding standards include ITU-T H.261, ISO / IEC MPEG-1Visual, ITU-TH.262 or ISO / IEC MPEG-2Visual, ITU-T H.263, ISO / IEC MPEG-4Visual and ITU-T H. 264 (also known as ISO / IEC MPEG-4AVC). In addition, efforts are being made to develop new video coding standards. One of these standards under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/50H04L1/16H04N7/66H04N19/89
CPCH04N19/00781H04L1/0061H04N19/00884H04N19/00442H04N7/66H04N19/00424H04N7/50H04L1/1671H04N7/26946H04N7/26351H04N19/30H04N19/34H04N19/61H04N19/70H04N19/132
Inventor M·安尼克塞拉王业奎
Owner NOKIA TECH OY
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