| 摘要 |
Data words of non-standard length are used to communicate optional messages with non-standard meaning in an interrupted-clock, bit-serial data transmission system which employs a timing channel and one or more separate data channels. In an interrupted-clock digital data transmission system, interruptions of clock pulses in a timing channel are used to identify individual data word groups in the simultaneous messages on one or more data channels. According to the present invention, message words constituting groups of data bits more or less in number than some standard value are used to communicate optional messages with non-standard content or meaning. Such altered-length message words may be used, for example, to monitor the operation of the transmission system itself and to control its operation. They make efficient use of the available system bandwidth. A clock regenerator circuit is described which is an improvement over the prior art for altered-length messages.
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