发明名称 |
IMPLEMENTATION OF OPPORTUNISTIC DATA ON A STATISTICAL MULTIPLEXING ENCODER |
摘要 |
<p>A method and apparatus for providing an opportunistic data capability for an existing statistical multiplexing encoder platform, such as a multi-channel video data encoder. An Opportunistic Data Processor (ODP) is provided as a plug-in card or an external device that can be interfaced with an existing multi-channel encoder. The ODP communicates with a Quantization Level Processor (QLP) and Packet Multiplexer (PM) in the multi-channel encoder as if it was just another channel encoder. The ODP implements a special rate control scheme by encoding data and sending it to the PM only when a global Quantization Level (QL) indicates that spare bandwidth is available. Spare bandwidth is assumed to be available when the global QL is less than a threshold value. Moreover, the OPD sends a bandwidth need parameter to the QLP, as do the other channel encoders. However, the ODP's need parameter is scaled by a function of the global QL to attenuate its actual bandwidth need as the global QL increases to provide smooth variations in the ODP's encoded data rate.</p> |
申请公布号 |
CA2313104(A1) |
申请公布日期 |
2001.01.19 |
申请号 |
CA20002313104 |
申请日期 |
2000.06.29 |
申请人 |
GENERAL INSTRUMENT CORPORATION |
发明人 |
WU, SIU-WAI;WIRICK, KEVIN |
分类号 |
H04N7/26;H04J3/16;H04J3/24;(IPC1-7):H04J3/16 |
主分类号 |
H04N7/26 |
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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