Audio/video system providing variable delay
AssigneeThomson Licensing
InventorDavid Lawrence Albean
Life of this patent
Estimating the term…
Abstract
An audio/video system (100) is capable of introducing variable amounts of delay into a signal path so as to properly synchronize two signals, such a video signal and a corresponding audio signal. According to an exemplary embodiment, the audio/video system (100) includes first circuitry (50) for applying a first delay to a first digital signal. Second circuitry (80) applies a variable second delay to a second digital signal to time align the second digital signal relative to the first digital signal. The second circuitry (80) includes an addressable memory (84) for selectively storing the second digital signal and for outputting the second digital signal on a first-in, first-out basis to apply the variable second delay to the second digital signal.
Claims19
An audio/video system (100), comprising:
- first means (50) for applying a first delay to a first digital signal;
- and
- second means (80) for applying a variable second delay to a second digital signal to time align the second digital signal relative to the first digital signal, wherein the second means (80) includes addressable memory means (84) for selectively storing the second digital signal and for outputting the second digital signal on a first-in, first-out basis to apply the variable second delay to the second digital signal.
An audio/video system (100), comprising:
- video circuitry (50) operative to apply a first delay to a digital video signal;
- and
- audio circuitry (80) operative to apply a variable second delay to a digital audio signal to time align the digital audio signal relative to the digital video signal, wherein the audio circuitry (80) includes an addressable memory (84) operative to selectively store the digital audio signal and output the digital audio signal on a first-in, first-out basis to apply the variable second delay to the digital audio signal.
A method for synchronizing a first digital signal relative to a second digital signal, comprising steps of:
- applying a first delay to the first digital signal;
- and
- applying a variable second delay to the second digital signal to synchronize the second digital signal relative to the first digital signal, wherein the variable second delay is applied to the second digital signal by steps comprising:
- selectively storing the second digital signal within an addressable memory (84);
- and
- outputting the second digital signal from the addressable memory (84) on a first-in, first-out basis.
Dependencies are inferred from the claim text.