Data transmission method and device based on gradable bit streams

A data transmission method and bit stream technology, applied in the field of data transmission methods and devices based on scalable bit streams, can solve the problems of not considering spatial classification, not considering space and time classification, etc., so as to improve the ability of anti-channel interference, The effect of high transmission reliability

Inactive Publication Date: 2010-06-09
ACAD OF BROADCASTING SCI SARFT
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  • Description
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Problems solved by technology

In terms of SVC forward error correction protection, some documents use different protection methods according to the time priority, but do not consider space classification and SNR (Sign

Method used

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  • Data transmission method and device based on gradable bit streams
  • Data transmission method and device based on gradable bit streams
  • Data transmission method and device based on gradable bit streams

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Embodiment Construction

[0051] An analysis of the existing technologies reveals that these unequal SVC protections all use a single index, such as time domain priority or SNR priority, without comprehensively considering the relationship between the three. In view of this, the present invention provides an anti-error transmission scheme based on SVC. First, comprehensively analyze the importance of spatial enhancement layer data, temporal enhancement layer data, and signal-to-noise ratio enhancement layer data relative to the reconstructed image. According to different importance, the data of the enhancement layer are classified into several levels—for example, classified into 3 categories. For different types of enhancement layer data, forward error correction protection methods with different redundancy levels are used.

[0052] Experiment shows that the present invention has achieved relatively good effect to the unequal protection scheme of H.264SVC video data, and EEP (Equal error protection, eq...

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Abstract

The invention discloses data transmission method and device based on gradable bit streams. The data transmission method comprises the following steps of: dividing reinforcement layer data into a plurality of grades according to the significance for reconstructing an image; adopting error correction modes with different redundancy rates for the data of different grades, wherein the higher the significance for reconstructing the image is, the higher the redundancy rate of the error correction mode adopted by a grade; and carrying out error correction coding for base layer data, wherein the redundancy rate of the error correction coding is at least equal to that of the error correction coding of a grade with the highest significance. Compared with the traditional transmission method adopting equal error protection or unequal data protection, the invention can enhance the channel disturbance resistant capacity under the precondition of indistinctly increasing the redundancy rate and achieve higher transmission reliability.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data transmission method and device based on a scalable bit stream. Background technique [0002] With the rapid development of wireless network technology, more and more users hope to transmit video streams in real time on the wireless network. In video streaming services based on IP network and client / server architecture, clients often have different terminal processing and display capabilities, and network bandwidth resources change at any time. Scalable video coding is not only especially suitable for network transmission because of its flexibility in time domain, space domain and quality, but also can meet the special needs of different terminals of clients. As the requirements for market scalability become more and more extensive and intense, ISO (International Organization for Standardization, International Organization for Standardization) / IEC (International Electro T...

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Application Information

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IPC IPC(8): H04N7/66H04L1/00H04N19/89
Inventor 高鹏滕国伟杨明
Owner ACAD OF BROADCASTING SCI SARFT
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