| 摘要 |
A video code stream gamma characristic correction method and a multipoint control unit in video communication field, which resolves the gamma distortion problem of video image in the exist multimedia communication. In the method of the invention, the receiving end carries out correction once through carrying the gamma characristic parameter of the transmission end in the video code stream; or the multipoint control unit and the receiving end correct gamma distortion of the video image at multiplestep. A multipoint processor(200) of the multipoint control unit of the invention includes the modules as follows: gamma characristic parameter storing module(201), which stores gamma characristic parameter of the video image transmission end; gamma characristic correction module(202), which is connected to the gamma characristic parameter storing module and corrects the gamma characristis of the video image according to the gamma characristic parameter of the video image transmission end. The method of the invention can achieve gamma correction in multimedia communication, and improves quality of video communication and user's experience.
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