| 摘要 |
<p>A digital communication system includes a predictive decoder (30) that is operative to convert received digital codes into a predictively decoded signal, e.g., speech signal, and to generate a set of predictive parameter signals and a signal representative of the communication system bit rate. A set of filter control signals is generated (325) responsive to the communication bit rate signal. The predictively decoded signal is passed through a filter (335) which modifies the output signal responsive to the filter control signals and the decoder predictive parameter signals to improve the output signal quality. The filter control signals selectively alter the predictive parameter signals to optimize the predictively decoded signal modification for the current transmission bit rate.</p> |
