Protection of streaming A/V data

摘要

For streaming A/V data a frame structure is defined providing improved protecting and opportunities for concealing errors. The frame includes a header block 10 and a plurality of sub-blocks 22, 24, 26, 28. Each of the sub-blocks includes digitally encoded audio/video data corresponding to predetermined consecutive periods of the A/V signal. The sub-blocks are generally of variable length. For the header block and each of the sub-blocks a respective associated error protecting code 31, 32, 34, 36 and 38 is present in the frame for protecting the associated block during transmission. The header block 10 also includes a location information field 40 that provides information on the location of at least one of the sub-blocks in the frame.