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A stream control device for video image data

A technology of video images and data, applied in the field of communication, to simplify the flow control process and reduce the complexity

Inactive Publication Date: 2008-09-17
北京泰得思达科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no precise mathematical relationship between the size of the quantization index and the size of the code stream. The change of the quantization index can only vaguely reflect the change trend of the code stream. Therefore, it is necessary to set the feedback value to continuously correct the quantization index, so that the image The code stream meets the bandwidth requirements and realizes the purpose of flow control

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  • A stream control device for video image data

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Embodiment Construction

[0011] In order to make the purpose, technical solutions and advantages of the present invention clearer, the implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings:

[0012] This embodiment provides a stream control device for video image data, which mainly includes: a coded data buffer unit 10 , a stream control processing module 20 , a timing service module 40 and a sending buffer unit 30 .

[0013] The encoded data buffer unit 10 includes one or more buffers, and buffers the code stream data sent by the encoder;

[0014] The sending buffer unit 30 includes one or more buffers corresponding to the buffers in the encoded data buffering unit, and outputs the data sent by the flow control processing module to the PSTN network at a certain set constant rate.

[0015] The timing service module 40 starts the timing service and starts the timing flow control service at the same time after the set timing start...

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Abstract

The invention discloses a flow control device for video image data, mainly comprising a coding data buffer unit for storing the bit stream data sent by a coder; and a flow control processing module for outputting the data stored in the coding data buffer unit, and controlling the start of data coding according to the data information stored in the coding data buffer unit. The flow control device can lower the complexity of flow control scheme of video image data, and provide stable high-quality video image transmission for users.

Description

technical field [0001] The invention relates to the communication field, in particular to a flow control device for video image data. Background technique [0002] In the process of data transmission, the data volume of the original video image is very large, which is not suitable for direct transmission. Therefore, before the data of the video image is transmitted, the data of the original video image must be compressed by an image compression algorithm to obtain a data suitable for transmission. After the amount of data is collected, transfer it again. [0003] The above-mentioned quantization index of each data block is controlled, thereby reducing the code stream of each frame of image coding, so that the code stream meets the transmission requirements. Because the size of the quantization index of the data block directly determines the size of the code stream, controlling the size of the quantization index also controls the size of the code stream. However, there is n...

Claims

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Application Information

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IPC IPC(8): H04N7/24H04N7/26H04N19/423H04N19/85
Inventor 任忠宇季光
Owner 北京泰得思达科技发展有限公司