A telescopic video coding method for optimized transmission of interested area

A technology of priority transmission and video coding, applied in digital video signal modification, television, electrical components, etc., can solve the problem of combining priority transmission without regions of interest with scalable video coding methods, etc.

Inactive Publication Date: 2008-09-10
HARBIN ENG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] All of the above methods do a good job, but do not combine ROI-first transmission with scalable video coding methods

Method used

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  • A telescopic video coding method for optimized transmission of interested area
  • A telescopic video coding method for optimized transmission of interested area
  • A telescopic video coding method for optimized transmission of interested area

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Embodiment Construction

[0028] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0029] In the present invention, there are two ways to determine the ROI in the scalable video coding scheme for ROI priority transmission, one is determined by the encoding end during encoding, and the other is specified by the user at the receiving end. When encoding, set the central region of the video image as the region of interest.

[0030] H.264's excellent compression ability and adaptability to different networks have become the preferred technology for video transmission applications on specific wireless channels with harsh conditions and the basis for other research work. The realized scalable video coding structure based on H.264 is a layered coding structure, and its structure is as follows figure 1 shown. The codec of the basic layer is implemented by H.264, and the codec of the enhanced layer is designed by itself by referring to the codec of CAVL...

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Abstract

The invention provides a scalable video coding method where a region of interest has transmission priority. In the method, the region of interest is treated with default setting or optionally chosen by a user at a receiving terminal during coding. The bit stream of an enhancement layer is treated in different manners according to the fact that whether an instruction is received from the region of interest (ROI) when the instruction is sent. If the instruction from the ROI is not received, the encoded bit stream is packed according to a preset order and an obtained channel bandwidth; if the instruction from the ROI is received, a coding and recoding module recodes after coding according to the position and the size of the region of interest and has the transmission priority so as to ensure that the region of interest of the user at the receiving terminal is more clear to improve the subjective quality of the video. When an encoded video streaming media is transmitted or a quasi-real-time video is transmitted by the scalable video coding method of the invention, the user at the receiving terminal can optionally choose the region of interest and the video effect of the region of interest can be greatly improved, therefore, not only precious transmission bandwidth resources is saved, but also the subjective quality of the video is improved.

Description

(1) Technical field [0001] The invention relates to a video streaming media transmission technology, in particular to a region-of-interest priority transmission of scalable video streaming media. (2) Background technology [0002] On the wireless Rayleigh channel, a low-complexity foreground extraction technology based on block segmentation is used to allocate more bits to the foreground area, which can effectively control the bit error problem in low-rate two-way video transmission. In a multi-point video conferencing system, using the method of transcoding the region of interest, the participants in the active state are identified from the encoded multi-channel video streams of each conference sub-venue according to the motion characteristics in each split screen, Dynamically reduce the frame rate of the split-screen of the inactive participants, and distribute the saved bit rate to the split-screen of the active participants, improving the video quality. [0003] In addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/129H04N19/13H04N19/167H04N19/37H04N19/625
Inventor 赵安邦惠娟惠俊英蔡平殷敬伟
Owner HARBIN ENG UNIV
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