Device and method for flow control of video image data
A video image and data technology, applied in the field of communication, can solve problems such as the inability to guarantee the quality of video communication, high complexity of the flow control scheme, high hardware cost, etc., to solve unstable video image quality, stabilize video image transmission, and reduce costs Effect
Inactive Publication Date: 2009-07-01
APLUS COMM TECH BEIJING
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Problems solved by technology
The flow control scheme works throughout the entire video communication process, so even if the video communication quality recovers at a certain moment, it will degrade again due to the impact of flow control
Therefore, using the above-mentioned existing flow control scheme, it is impossible to guarantee the quality of video communication during the entire video communication process
[0010] In addition, the flow control scheme of the above-mentioned prior art has relatively high complexity
Since the adjustment of the quantitative index is based on the feedback principle, in order to obtain a more accurate feedback coefficient, a large number of feedback calculations are introduced in the adjustment process, especially a large number of floating-point operations are introduced. Therefore, the implementation of this scheme requires high hardware cost
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[0036] The present invention provides a flow control device and method for video image data. The core of the present invention is to implement flow control with a timing service. In the timing service, whether to start the encoder is determined according to the cached data information, and the control Transmission of data obtained after encoding.
[0037] The present invention will be described in detail below with reference to the accompanying drawings. The device and method described in this method are applicable to various application scenarios for transmitting video image data. The following uses the application of the device and method in the PSTN videophone system as an example to illustrate the device and method of the present invention.
[0038] The structural representation of the embodiment of the PSTN videophone system that has applied the device described in the method is as figure 2 shown. The device described in the method, as a video flow control device of th...
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This invention provides one flow control device and method of one visual image data, wherein, the device compress codes data buffer unit to receive and store codes data; flow control and process module to output buffer unit data and to control data codes starting according to codes data buffer unit. The method comprises steps of storing and outputting coded data and controlling data codes according to stored information.
Description
technical field [0001] The invention relates to the communication field, in particular to a device and method for video image data flow control. 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] In the PSTN (Public Switched Telephone Network, Public Switched Telephone Network) line video communication process, due to bandwidth limitations, in order to ensure continuous high-quality video communication, it is necessary to implement various restrictions such as flow control on video image data. Flow control is to control and process the code stream obtained after video image encoding, so as to ens...
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IPC IPC(8): H04N7/24H04N7/26H04N19/146H04N19/164
Inventor 庞潼川王义锋许操杨武军万新章东湖
Owner APLUS COMM TECH BEIJING