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Method, apparatus, and system for enhancing robustness of predictive video codecs using a side-channel based on distributed source coding techniques

A technology of predictive decoding and decoder, applied in the direction of adjustment of source coding, signal transmission system, transmission modification based on link quality, etc.

Active Publication Date: 2007-07-04
QUALCOMM INC
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it may not be efficient to use ARQ or FEC schemes (or a combination of both), since delay constraints of video applications may preclude the use of these schemes
Also, FEC based schemes do not guarantee whether the data is received or not, the drift persists until the next intra is received (intra is used by the video encoder to break the prediction loop and thus stop the drift)

Method used

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  • Method, apparatus, and system for enhancing robustness of predictive video codecs using a side-channel based on distributed source coding techniques
  • Method, apparatus, and system for enhancing robustness of predictive video codecs using a side-channel based on distributed source coding techniques
  • Method, apparatus, and system for enhancing robustness of predictive video codecs using a side-channel based on distributed source coding techniques

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Embodiment Construction

[0047] Current video coding standards use a predictive framework to obtain good compression performance for video signals. Examples of such compression schemes include MPEG-4, H.263+, and H.264. However, when such a compressed bitstream is transmitted over an error-prone channel, the video quality is severely compromised, as shown in Figure 2(a)–(c) using the target PSNR metric. Examples of error-prone channels include cdma2000(R), WCDMA, GSM, and other emerging wireless networks. In the present invention, video data compressed using predictive codec is called "main stream", and a logical channel on which the main stream is transmitted is called "main channel".

[0048] Examples of mitigating the deleterious effects of channel errors include retransmissions of transmission units with errors (RLP retransmissions, hybrid ARQ, etc.), error-resistant packetization (stronger error protection for semantically more significant bits in transmission units data partitioning, data inte...

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Abstract

A method, apparatus, and system for providing distributed source coding techniques that improve data coding performance, such as video data coding, when channel errors or losses occur. Errors in the reconstruction of the data is eliminated or reduced by sending extra information. Correlation between a predicted sequence and an original sequence can be used to design codebooks and find the cosets required to represent the original image. This information may be sent over another channel, or a secondary channel.

Description

[0001] Claiming Priority Based on 35 U.S.C. §119 [0002] This application for patent claims U.S. Provisional Application No. 60 / 576,193, filed June 1, 2004, entitled "METHOD, APPARATUS, AND SYSTEM FOR ENHANCING ROBUSTNESS OFPREDICTIVE VIDEO CODECS USING A SIDE-CHANNEL BASEDON DISTRIBUTED SOURCE CODING TECHNIQUES" priority, the provisional application is assigned to the assignee of the present application and is hereby incorporated by reference in its entirety. [0003] References to Co-Pending Patent Applications [0004] This patent application is related to the following co-pending U.S. Patent Application No. 10 / 396,982, the co-pending U.S. patent application assigned to the assignee of the present application and hereby incorporated by reference. technical field [0005] The present invention relates generally to multimedia over error-prone networks, and more particularly to video encoding and decoding techniques for use with multimedia over wireless networks. Backgro...

Claims

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Application Information

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IPC IPC(8): H04N7/64H03M13/00H04N19/89G06F11/00G06F11/30G08C25/00H04L1/00H04L1/22
CPCH04N7/66H04L1/22H04N19/00466H04L2001/0096H04L1/0014H04N7/26361H04N19/0046H04N19/39H04N19/395
Inventor 哈利纳特·加鲁达德里纳韦恩·B·斯里尼瓦桑莫特赫金·钟卡纳安·拉马钱德兰阿比希克·马宗达
Owner QUALCOMM INC
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