| 摘要 |
The present invention relates to a sound device (SD 1 ), connected to a computer (P 1 ), for handling of asynchronously transferred digital audio packets ( 5 ) on a network (LAN 1 ). The computer has an interface ( 3 ) connected to a telephony application ( 1 ), a driver (D 3 ) and a bus ( 4 ). The sound device (SD 1 ) is connected ( 9 ) via the bus ( 4 ) and includes a software frame buffer (B 2 ), codecs (C 2 ) and an A/D-D/A converter (AD 2 ), which is connected to in/out devices ( 10, 11, 12 ). The sound packets ( 5 ) are transferred asynchronously through the computer (P 1 ), are buffered in the sound device frame buffer (B 2 ), decoded in the codec (C 2 ) and D/A converted into an analog signal for the in/out devices. Speech to the in devices ( 11, 12 ) is processed in a corresponding manner. Having the buffer (B 2 ) close to the codec (C 2 ) enables processing of the sound packets, e.g. with respect to the varying time delay in the computer (P 1 ), restoring lost packets and producing replacement frames. The sound device (SD 1 ) relieves the computer (P 1 ) of the heavy workload of processing the sound packets ( 5 ).
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