Encoding auxiliary information with frame-based encoded audio information

摘要

Blocks of encoded audio information are arranged in frames separated by gaps or guard bands that are aligned with frames of video information. The gaps are provided to protect the audio information against corruption caused by uncertainties or jitter in editing operations such as switching between two difference sources of video/audio information. The otherwise wasted space or bandwidth required to convey the gaps is utilized by conveying encoded segments of auxiliary information. When the encoded auxiliary information is subsequently decoded, an error recovery process provides substitute information for those segments that are corrupted by an editing operation. In one embodiment, the recovery process is adapted according to the choice of an auxiliary sync word conveyed in the segment.