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Coding method of fine and classified video of space domain classified noise/signal ratio

A technology of video coding and hierarchical coding, which is applied in the fields of digital video signal modification, television, and image communication. Effect

Inactive Publication Date: 2007-08-15
SHANGHAI UNIV +1
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Problems solved by technology

Only one option is provided for receiving devices with low resolutions, and that is very low quality base layer video, even with sufficient network bandwidth
On the other hand, when the FGSS coding scheme performs motion estimation at different resolutions, the obtained motion vectors are not directly related to the reference frame, so the coding of the motion vectors will take up more bits.

Method used

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  • Coding method of fine and classified video of space domain classified noise/signal ratio
  • Coding method of fine and classified video of space domain classified noise/signal ratio

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Embodiment Construction

[0048] One implementation of the invention is as follows.

[0049] Referring to Figure 1, this spatially scalable SNR-FGS coding method based on high / low resolutions with enhancement layers can make the video quality at high and low resolutions finely scalable, and make motion vectors at different resolutions A link is established which reduces both the number of bits used for motion vector coding in high-resolution bitstreams and the amount of data requiring enhanced protection.

[0050] The steps are:

[0051] (1) Generate video images under high / low resolution: generate low-resolution and high-resolution video images from the original video through spatial classification;

[0052] (2) Base layer and enhanced coding at low resolution: Under low resolution, encode the base layer of the video with H.264 / AVC to generate a low resolution base layer video stream. The enhancement layer is encoded using bit-plane coding technology to generate a low-resolution enhancement layer vi...

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Abstract

The related space-staged SNR fine-staged video coding method comprises: combining the space-staged code and SNR fine-staged code to make both high and low resolution video have fine-staged reinforcing layers, providing the reference frame on low resolution to the high resolution video reference frame, and taking two times of the low resolution motion vector as the estimation of motion on high resolution; on high resolution, taking motion compensation directly on space estimated residual frame. Compared with current GFSS means in MPEG-4, for CIF format video, this invention adds 0.52dB on Y1-PSNR while reducing code rate 10.91%, and adds 0.20dB for Y0-PSNR.

Description

technical field [0001] The invention relates to a space-domain scalable signal-to-noise ratio fine scalable video coding method based on high / low resolution with enhancement layer. Especially different from the existing method is the video coding method in which a low-resolution enhancement layer is added in addition to the base layer in the low-resolution video. Background technique [0002] Transmitting video streams on the Internet and wireless networks is one of the current research hotspots. 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. In order to be more suitable for IP or wireless network applications such as IP video telephony, video conferencing, video surveillance, and mobile video, where customers have different requirements and bandwidth fluctuates randomly, it is necessary to perform spatially scalable...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/34H04N7/32H04N7/30H04N7/50H04N19/513H04N19/53
Inventor 张兆扬沈礼权王国中
Owner SHANGHAI UNIV
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