发明名称 |
Buffer control for variable bit-rate channel. |
摘要 |
The problems of buffer overflow and underflow encountered when employing actually variable or effectively variable bit-rate channels for communicating encoded video images are overcome by jointly controlling the number of bits employed to encode each video frame and the transmission bit-rate of the variable bit-rate channel as experienced by the encoder. The selection of the number of bits employed to encode each video frame, and hence the encoder bit-rate, as well as the associated channel bit-rate are determined from the encoder buffer fullness, a determination of the decoder buffer fullness and any constraint imposed on the channel. The encoder is responsive to the selected encoder bit-rate and accordingly adjusts its encoding parameters so as to achieve the selected encoder bit-rate. |
申请公布号 |
EP0515101(A2) |
申请公布日期 |
1992.11.25 |
申请号 |
EP19920304377 |
申请日期 |
1992.05.14 |
申请人 |
AMERICAN TELEPHONE AND TELEGRAPH COMPANY |
发明人 |
HASKELL, BRIAN GEOFFRY;REIBMAN, AMY RUTH |
分类号 |
H04B14/04;G06T9/00;H04J3/16;H04L12/56;H04L29/08;H04N7/24;H04N7/52;H04N7/60;H04N19/00;H04N21/234;H04N21/236;H04N21/2368;H04N21/24;H04N21/2662;H04N21/434;H04N21/44;H04Q11/04 |
主分类号 |
H04B14/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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