| 摘要 |
Method, apparatus and computer program product are disclosed for selectively reducing the bandwidth of real-time video data for transmission on a bus having varying bandwidth, while minimizing perceptible loss of picture quality. After detecting an overflow condition within a buffer coupled to a bus, video data to be written to the buffer is discarded until a prior pending request for transmission of a pending block of video data from the buffer is granted and begun. After beginning the transmitting, the discarding of data is discontinued and new video data is written into the buffer. A next bus request is made for transmission of all remaining data in the buffer stored prior to detecting the overflow condition. The amount of discarded data in the line is monitored and used to determine an address for a new block of data stored after the discontinuity in the line of video data. Temporal redundancies between frames of a video image is employed to fill in the discontinuity in the line of video data by using correspondingly positioned data in a corresponding line of a prior frame or field.
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