Synchronizing apparatus for a compressed audio/video signal receiver
AssigneeThomson Licensing
InventorFranck Michel Durand
Life of this patent
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Abstract
A compressed audio/video, includes circuitry to measure the relative synchronization of decompressed audio and video signals. If audio and video signal synchronization is within a first range of values, synchronization circuitry within the receiver will attempt to appropriately time align the signals. Alternatively, if actual synchronization exceeds the first range, attempts to synchronize the signals are suspended and non-synchronized decompressed audio and video signals are provided.
Claims11
In a receiver for processing compressed audio/video signal, apparatus comprising:
- a detector for providing said compressed audio/video signal;
- an audio decompressor, responsive to said compressed audio/video signal, for providing decompressed audio signal;
- a video decompressor, responsive to said compressed audio/video signal, for providing decompressed video signal;
- an error detector, responsive to time stamps provided with decompressed audio signal and decompressed video signal, for generating an error signal which is a measure of non-synchronization of associated decompressed audio and decompressed video signals;
- a processor, responsive to a first range of values of said error signal for controlling said audio decompressor to skip or repeat segments of decompressed audio signal for synchronizing associated decompressed audio and video components, and responsive to error signals greater than said first range for preventing synchronization of associated decompressed audio and video components.
A method of synchronizing audio and video components in a compressed audio/video receiver comprising:
- determining values indicative of timing of non synchronization of decompressed audio and video signals;
- effecting synchronization of said decompressed audio and video signals if said values are less than a predetermined time and providing synchronized or partially synchronized decompressed audio and video output signals;
- and
- preventing/suspending synchronization processes of said decompressed audio and video signals if said values are greater than said predetermined time and providing non-synchronized decompressed audio and video output signals.
Dependencies are inferred from the claim text.