| 摘要 |
<p>The technical field of the invention generally concerns systems for receiving and transmitting compressed video and audio data. In particular, a subscriber system (10) includes a communication subsystem (12) to receive compressed data from and transmit compressed data to an ISDN primary access line (14) utilizing the 'bandwidth on demand' feature of that communication channel. The communication subsystem (12) separates received compressed data into compressed video data and compressed audio data. Within the subscriber system (10), the compressed video data is transmitted to a programmable video data format conversion subsystem (28) for decompression and production of a visible image on a CRT (82). Similarly, compressed audio data is transmitted to a programmable audio data format conversion subsystem (192) for decompression and production of an audible sound on a speaker (262). Compressed data of visible images and audible sounds may also be obtained with and transmitted from the subscriber system (10).</p> |
