| 摘要 |
An image collection, distribution and management system employs wherein multiple compression at the source, permitting various signals to be distributed via a network, depending on the functional aspects of the signal, as well as on the bandwidth capacity of the chosen distribution path or network. Enhanced decompression schemes in the receiving systems further improve the overall efficiency and quality of the transmitted signals. Time stamps are appended to each discrete file to facilitate reproduction of the individual files in the sequence. Further, when transmission of the file through typical communications networks involves significant and variable delay in transmission, the time stamps provide a means for the reproducing device to display each individual file in correct temporal sequence. The time stamp represents the time at which the file was captured, as measured by a suitable time base inside the source. This time base may be provided by the source operating system. Alternatively, the time stamp may be derived from a running count of the incoming frames from the source. The system also supports communications networks having widely differing, non-interoperable protocols. This expands the utility of these disparate networks as media for conveying compressed file sequences.
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