Francis Cheung

US Patent:

7174085, Feb 6, 2007

Filed:

Aug 20, 2001

Appl. No.:

09/933231

Inventors:

Jason Demas - Irvine CA, US
Marcus Kellerman - Aliso Viejo CA, US
Francis Cheung - Del Mar CA, US
Sherman Xuemin Chen - San Diego CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04N 5/781
H04N 5/76
H04N 5/915

US Classification:

386 68, 386111, 386124

Abstract:

Methods and apparatus for switching between a live video decoding and a recorded playback in a digital video and recording system. A received video data stream is transmitted to a first-in first-out video decoder buffer without first looping the video data stream through a playback buffer. The video data stream is transmitted from the video decoder buffer to a video decoder. If a “pause” command is received, the video data stream is transmitted to a first-in first-out playback buffer, while continuing to transmit the video data stream to the video decoder buffer. Transmission of the video data stream to the video decoder buffer is halted when the video decoder buffer fills up. The last byte of the video data stream that was transmitted to the video decoder buffer is marked. If a “play” command is received, the video data stored in the video decoder buffer is transmitted to the video decoder. The video data stored in the playback buffer is transmitted to the video decoder buffer starting at a point immediately after the data element that was marked previously.

US Patent:

20020106018, Aug 8, 2002

Filed:

Oct 2, 2001

Appl. No.:

09/969212

Inventors:

Lionel D'Luna - Irvine CA, US
Francis Cheung - Del Mar CA, US

International Classification:

H04B001/66
H04N007/12
H04N011/02
H04N011/04

US Classification:

375/240010

Abstract:

A single chip set-top box system and method is provided. The system comprises, for example, a transceiver, an audio/video decoder, a CPU, peripherals, DAVIC MAC and a graphics processor. The transceiver receives a digitally modulated compressed audio/video signal, and the audio/video decoder receives the compressed audio/video signal from the transceiver and decompresses the compressed audio/video signal. The graphics processor blends the decompressed audio/video signal with graphics to generate a blended video image with audio.

US Patent:

20070127891, Jun 7, 2007

Filed:

Feb 6, 2007

Appl. No.:

11/671759

Inventors:

Jason Demas - Irvine CA, US
Marcus Kellerman - Aliso Viejo CA, US
Francis Cheung - Del Mar CA, US
Sherman Chen - San Diego CA, US

International Classification:

H04N 7/26

US Classification:

386112000

Abstract:

Methods and apparatus for switching between a live video decoding and a recorded playback in a digital video and recording system. A received video data stream is transmitted to a first-in first-out video decoder buffer without first looping the video data stream through a playback buffer. The video data stream is transmitted from the video decoder buffer to a video decoder. If a “pause” command is received, the video data stream is transmitted to a first-in first-out playback buffer, while continuing to transmit the video data stream to the video decoder buffer. Transmission of the video data stream to the video decoder buffer is halted when the video decoder buffer fills up. The last byte of the video data stream that was transmitted to the video decoder buffer is marked. If a “play” command is received, the video data stored in the video decoder buffer is transmitted to the video decoder. The video data stored in the playback buffer is transmitted to the video decoder buffer starting at a point immediately after the data element that was marked previously.

US Patent:

20130308927, Nov 21, 2013

Filed:

Jul 22, 2013

Appl. No.:

13/947381

Inventors:

Marcus Kellerman - Aliso Viejo CA, US
Francis Cheung - Del Mar CA, US
Sherman (Xuemin) Chen - San Diego CA, US

International Classification:

H04N 9/87

US Classification:

386344, 386356

Abstract:

Methods and apparatus for switching between a live video decoding and a recorded playback in a digital video and recording system. A received video data stream is transmitted to a first-in first-out video decoder buffer without first looping the video data stream through a playback buffer. The video data stream is transmitted from the video decoder buffer to a video decoder. If a “pause” command is received, the video data stream is transmitted to a first-in first-out playback buffer, while continuing to transmit the video data stream to the video decoder buffer. Transmission of the video data stream to the video decoder buffer is halted when the video decoder buffer fills up. The last byte of the video data stream that was transmitted to the video decoder buffer is marked. If a “play” command is received, the video data stored in the video decoder buffer is transmitted to the video decoder. The video data stored in the playback buffer is transmitted to the video decoder buffer starting at a point immediately after the data element that was marked previously.