Switching method for MDC/scalable coding

A multi-description and coding technology, applied in signal space coding for error detection, selective content distribution, television, etc., can solve problems such as no longer stable, become invalid, etc.

Inactive Publication Date: 2006-01-25
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the channel characteristics change dynamically, or if the channel characteristics change at both ends of the network as the bitstream traverses different networks, one approach or the other may become ineffective and no longer robust

Method used

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  • Switching method for MDC/scalable coding
  • Switching method for MDC/scalable coding
  • Switching method for MDC/scalable coding

Examples

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Embodiment Construction

[0019] Currently, network switches (gateways) in the Internet do not interpret the structure or content of data packets, all data packets are handled in a similar manner. Furthermore, the gateway does not provide blocking feedback. For the sender, only end-to-end feedback (that is, feedback from the receiver) can be used, and in general the sender must probe the network to obtain information about the connection conditions. Once encoded, the encoded video stream cannot be reformatted to accommodate changing network conditions while it is being sent.

[0020] This mismatch between the needs of streaming video and Internet transport protocols is resolved by the system and method of the present invention. According to the present invention, using multiple description coding ( figure 2 ) and scalable coding ( image 3 ) the best choice to format the prioritized encoded video stream, and then follow the corresponding multi-channel stream protocol system (respectively see Fig. 5...

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Abstract

A system and method is provided for switching between multiple description coding and scalable coding that is dependent on the network characteristics and uses forward error correction (FEC) and scalable or prioritized video.

Description

technical field [0001] The present invention relates to systems and methods for over-the-air conversion between multiple description coding (MDC) and scalable coding (SC) based on channel characteristics. The systems and methods of the present invention can also be implemented using scalable or prioritized coded streams and forward error correction (FEC) protection. Background technique [0002] Multiple Description Coding (MDC) is aimed at transmission over best-effort networks, and Scalable Coding (SC) is generally aimed at transmission over networks with some quality of service (QoS) guarantee. Multiple Description Coding (MDC) is a form of Multiple Description Coding designed to prevent error propagation problems by encoding video into multiple independently decodable streams, each with its own expected process and state. If a stream is lost, other streams can be decoded to produce usable video, and most importantly, correctly received streams can also provide bi-direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N7/26H04N7/66H04N21/2383
CPCH04N19/00818H04N19/00321H04N19/0086H04N19/00018H04N21/658H04L29/06027H04N19/00454H04N19/00866H04N21/234327H04N19/0046H04N19/00254H04L29/06523H04N21/6375H04N19/00236H04L65/607H04L65/80H04N21/64792H04N21/2383H04N19/00218H04N19/00472H04L29/0651H04N21/6377H04N21/234309H04N21/64738H04N19/00327H04N21/631H04N19/00127H04N19/00266H04N21/6125H04N19/159H04N19/172H04N19/63H04N19/169H04N19/37H04N19/103H04N19/132H04N19/164H04N19/187H04N19/39H04N19/40H04N19/188H04N19/66H04N19/67H04L65/70H04L65/752H04N21/238H04N21/63H03M13/25H04L65/1101
Inventor M·范德沙尔Q·李
Owner KONINK PHILIPS ELECTRONICS NV
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