PCR Clock Recovery in an IP Network
AssigneeBroadcom Corporation
InventorsJeffrey Fisher, Brian Schoner, Rajesh S. Mamidwar
Life of this patent
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Abstract
An IP network includes a central entity and at least one customer premises equipment (CPE) device. The central entity generates a program clock reference (PCR) clock and provides audio-visual packets to a CPE based on the PCR clock. The CPE sets a first clock based on the PCR clock for decoding operations. The CPE sets a second clock that is independent from the first clock for audio and video output operations. For example, the CPE can process the audio-visual packets using the second clock.
Claims20
An apparatus for decoding a packet into an analog output, comprising:
- a phase-locked loop (PLL) configured to recover a decoder timebase from the packet;
- a decoder configured to decode the packet using the decoder timebase to provide one or more decoded frames;
- and
- a clock generation module configured to generate a display timebase,
- wherein the display timebase is used to provide the analog output based upon the one or more decoded frames.
The apparatus of claim 9, wherein the software program that when executed further causes the clock generation module to adjust the display timebase.
A method for decoding a packet into an analog output, comprising:
- (a) recovering a decoder timebase from the packet;
- (b) decoding the packet using the decoder timebase to provide one or more decoded frames;
- (c) generating a display timebase;
- and
- (d) using the display timebase to provide the analog output based upon the one or more decoded frames.
An apparatus for decoding a packet into an analog output, comprising:
- means for recovering a decoder timebase from the packet;
- means for decoding the packet using the decoder timebase to provide one or more decoded frames;
- and
- means for generating a display timebase,
- wherein the display timebase is used to provide the analog output based upon the one or more decoded frames.
Dependencies are inferred from the claim text.