| 摘要 |
An audio subsystem for use in an HDTV broadcast system includes a sampler for sampling an analog audio signal at a sampling rate of 3H, where H is the NTSC horizontal scanning frequency. The sampled audio signal is formatted into repetitive blocks which are supplied to a compressor at a rate comprising an integral multiple of the data transmission frame rate of the HDTV system. An HDTV signal including the compressed audio blocks and a compressed video signal is transmitted and received by an HDTV receiver. The receiver reproduces a wideband video signal for display at a horizontal scanning rate of NH, where N is an integer equal to or greater than two, and an expanded digital audio signal at a sampling rate of 3H for driving a speaker system.
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