Method and device for transmitting scalable videos based on priorities

A transmission method and priority technology, applied in the direction of digital video signal modification, television, electrical components, etc., can solve the problems of video sequence quality degradation, inability to receive enough data packets, and reconstructed image quality degradation.

Inactive Publication Date: 2011-07-20
XIDIAN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if packet loss occurs, the receiving end of the scalable video may not be able to receive enough data packets to reconstruct a video image that meets its resolution requirements. In this case, the video sequence restored by the scalable video receiving end quality will degrade
That is to say, the quality of the reconstructed video image at the scalable video receiving end will be affected by the channel packet loss rate in the network. When the packet loss rate increases, the quality of the reconstructed image will decrease significantly

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  • Method and device for transmitting scalable videos based on priorities
  • Method and device for transmitting scalable videos based on priorities
  • Method and device for transmitting scalable videos based on priorities

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Embodiment Construction

[0048] In order to directly apply to the existing H.264 / SVC video coding standard and improve the service quality of the video stream, the embodiment of the present invention proposes a scalable video priority transmission method. Such as figure 1 As shown, the method includes the following steps:

[0049] Step 101: Prioritize the SVC layered code streams of each Group of Pictures (GOP, Group of Pictures) of the scalable video after SVC encoding.

[0050] Step 102: Packing and Raptor encoding the sorted SVC layered code stream, and sending the coded scalable video code stream to the receiving end of the scalable video through the transmission channel.

[0051] After receiving the encoded code stream, the receiving end of the scalable video can obtain the SVC layered code stream through Raptor decoding and compounding the code stream, and then reconstruct the video image after SVC decoding.

[0052] According to the hierarchical characteristics of the SVC layered code stream,...

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Abstract

The invention discloses a method for transmitting scalable videos according to priorities. The method comprises the following steps of: sequencing layered code streams which are subjected to scalable video coding (SVC) of each group of pictures (GOP) of the scalable videos based on priorities; and performing packing and Raptor coding on the sequenced SVC layered code streams and transmitting coded scalable video code streams to a scalable video receiving end through a transmission channel. The invention also discloses a device for transmitting scalable videos based on priorities. In the method, the SVC layered code streams are sequenced on the basis of priorities according to the layer characteristic of the SVC layered code streams, and packing and Raptor coding are performed on the sequenced SVC layered code streams, so that the problems of optimized selection and transmission of scalable video code streams are solved and the quality of a reconstructed image of the scalable video code streams can be finally enhanced.

Description

technical field [0001] The invention relates to the technical field of scalable video coding (SVC), in particular to a method and device for transmitting scalable video priority. Background technique [0002] SVC is a hierarchical and efficient video coding method. SVC can encode a video sequence into a code stream composed of a base layer and multiple enhancement layers with different hierarchical characteristics, in which the base layer can restore the image sequence with the lowest resolution and quality, while the enhancement layer can restore the image sequence with higher High resolution and quality image sequences. The time domain, space domain and quality domain provided by SVC can be graded in three ways, ensuring that the terminal can extract a code stream that meets a certain target bit rate, frame rate and spatial resolution from the received SVC code stream, and restore a code stream with Video images with different bit rates, frame rates or resolutions. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/00H03M7/30H04N19/102H04N19/146H04N19/147H04N19/154H04N19/177H04N19/187H04N19/196H04N19/30H04N19/31H04N19/33H04N19/36H04N19/65H04N19/66
Inventor 肖嵩卢冀蔡宁王晓利张永生
Owner XIDIAN UNIV
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