Real-time rate control media stream encoding method and system

A technology of code rate control and encoding method, which is applied in the field of code rate control of digital images, can solve problems such as image decoding and playback stuttering, and achieve the effects of avoiding out-of-sync decoding and playback, reducing quantization parameters, and avoiding sudden drops

Active Publication Date: 2012-10-10
HANGZHOU HIKVISION DIGITAL TECH
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  • Real-time rate control media stream encoding method and system
  • Real-time rate control media stream encoding method and system
  • Real-time rate control media stream encoding method and system

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[0024] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0026] The first embodiment of the present invention relates to a media stream encoding method with real-time rate control. figure 1 It is a schematic flowchart of the media stream encoding method with real-time bit rate control.

[0027] In step 101, it is judged whether the current coded frame needs to be skipped, and if so, go to step 102; oth...

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Abstract

The invention relates to the field of digital image processing, and discloses a real-time rate control media stream encoding method and a system. The problem of non-synchronization of decoding and playback of video and audio data caused by coding frame skipping can be solved. The method comprises the following steps that: when a media stream is encoded, if the situation that the current encoded frame needs to be subjected to frame skipping is determined, then a particular frame is generated to be used as a coding result of the current coded frame to be inserted into the media stream, wherein all macroblocks in the particular frame are coded in accordance with a skipped macroblock mode.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a code rate control technology for digital images. Background technique [0002] The bit rate control in video compression generally adjusts the quantization parameter (quantization parameter, referred to as "QP") through the frame-level or macroblock-level bit rate control algorithm to control the size of the coding bit rate, and realize the number of coding bits and the coding of the distribution. The number of bits is the same. [0003] In some applications that strictly require a constant encoder output bit rate, if the scene of the input image changes drastically or the image input noise suddenly increases, adjusting the quantization parameters alone cannot control the encoded output bit rate in a timely and effective manner. Cause code stream buffer overflow or valid data is overwritten. The general processing method is that the encoder adaptively skips frames, and...

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Application Information

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IPC IPC(8): H04N7/26H04N7/50H04N21/234
Inventor 梁铁俞海贾永华
Owner HANGZHOU HIKVISION DIGITAL TECH
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