| 摘要 |
A video data transmission system in which a transmission terminal (1) having a color camera (4) is required to transmit video information to a reception terminal (3) having only a black and white display (7). In order to minimise the transmission bit-rate, during a set-up process the reception terminal (3) sends a "LuminanceOnly" flag to the transmission terminal (1) advising the transmission terminal to send only the luminance component of the video signal generated by the color camera (4). The chrominance components generated by the camera (4) are either discarded or encoded as null data prior to transmission.
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