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Code rate control method for video coding and video data emission device

A technology of video data and bit rate control, applied in the field of video coding, can solve the problem that predictive coding cannot be well suited, etc., and achieve the effect of good video display effect

Inactive Publication Date: 2010-02-17
GUANGDONG VTRON TECH CO LTD
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Problems solved by technology

[0003] However, both of the above two real-time coding rate control methods fail to fully consider the network bandwidth conditions, and simply generate the current coding rate through the previous coding rate, resulting in predictive coding that cannot be well suited to the transmission of the current network conditions.

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  • Code rate control method for video coding and video data emission device
  • Code rate control method for video coding and video data emission device
  • Code rate control method for video coding and video data emission device

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Embodiment Construction

[0021] The packet loss rate refers to the loss of network transmission data. When the data packets generated by video encoding are relatively large, when the network condition is good, the data packet transmission is better, and the packet loss rate is relatively small, or even not lost. However, when the network condition is not good, the packet loss rate may be serious, resulting in the video image received by the receiver is not smooth, or even mosaic. It can be seen that the packet loss rate will affect the quality of video data transmission. The code rate control method for video encoding provided by the invention controls the output code rate by considering the factor of packet loss rate, so that the encoded data can better adapt to the transmission of the current network conditions, thereby achieving a better video display effect.

[0022] The sending of data packets carrying video data in the present invention is based on RTP (Real-time Transfer Protocol, Runtime Transfer ...

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Abstract

The invention provides a code rate control method for video coding, wherein, control packages are sent at fixed period by a sender through a real-time transmission control feedback link; when feedbackcontrol packages are received, code rate is obtained according to package loss rate in the feedback control packages and video data is sent through the real-time transmission link according to the obtained code rate. The code rate control method for video coding and a transmitting device control output code rate by consideration of factors of package loss rate and encoded data can be suitable fortransmission of current network conditions better, thereby better video display effect is reached.

Description

Technical field [0001] The present invention relates to video coding technology, in particular to a method for code rate control of video coding. Background technique [0002] Video coding standards usually adopt intra-frame and inter-frame prediction, discrete cosine transform quantization and entropy coding techniques that remove temporal and spatial correlations to achieve higher coding efficiency. For video communication, due to the limited bandwidth of the communication channel, it is necessary to control the video coding rate to ensure the smooth transmission of the coding stream and the full utilization of the channel bandwidth. For different applications, there are currently a variety of rate control (RateControl) strategies. Among them, there are mainly two real-time coding rate control methods: using the number of bits generated by the previous macroblock encoding to predict the number of bits generated by the current macroblock encoding, or using the video encoding ra...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/24H04N7/26H04N19/164H04N19/166H04N19/85
Inventor 徐蜀中郑伟钿
Owner GUANGDONG VTRON TECH CO LTD
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