| 摘要 |
In a data transfer system, the bits of a frame of a loss-tolerant digital signal, such as one representing speech or music, are grouped according to their significance. These groups may be transferred together or separately. The less significant bits need not be transferred at the cost of some loss of fidelity but the result is a scalable system in which enables easy selection of points in a bandwidth-fidelity space for the transfer of data. In preferred forms, the transferred data is compressed before transfer. In order to overcome loss of packets in network communication, each packet contains data from a plurality of frames, preferably with older frames being represented with lower fidelity than more recent frames. |
