System and method for digital multimedia stream conversion

• US 20070065122A1
• Filed: 09/22/2006
• Published: 03/22/2007
• Est. Priority Date: 05/24/2002
• Status: Active Grant

• Current Assignee: ARRIS Enterprises LLC (CommScope Holding Company, Inc.)
• Original Assignee: Digeo Incorporated (CommScope Holding Company, Inc.)
• Inventors: Chatterton, Geoff
• Granted Patent: US 8,437,624 B2
• Time in Patent Office: Days
• US Class Current: 386/334
• CPC Class Codes: H04N 21/4263 involving specific tuning arrangements, e.g. two tuners
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/4402 involving reformatting operations of video signals for household redistribution, storage or real-time display details of conversion of video standards at pixel level H04N7/01; video transcoding H04N19/40; adapting incoming signals to the display format of the display terminal G09G5/005; media handling at the source in data packet switching networks H04L65/764
• CPC Class Codes: H04N 21/440209 for formatting on an optical medium, e.g. DVD
• CPC Class Codes: H04N 21/4408 involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 5/91 Television signal processing therefor
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8063 using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal

Abstract

A method includes reading selected portions of video content from a digital versatile disk (“DVD”), said selected portions of video content separated by periods of time to provide a fast forward or rewind mode; generating a transport stream of transport stream packets containing said selected portions of video content; and in response to detecting said fast forward or rewind mode, causing a transport stream decoder to decode said transport stream packets without synchronization.

Claims

1. A method comprising:

reading selected portions of video content from a digital versatile disk (“

DVD”

), said selected portions of video content separated by periods of time to provide a fast forward or rewind mode;

generating a transport stream of transport stream packets containing said selected portions of video content; and

in response to detecting said fast forward or rewind mode, causing a transport stream decoder to decode said transport stream packets without synchronization.

2. The method as in claim 1 wherein said selected portions of video content comprise at least one I frame and several B or P frames.

3. The method as in claim 1 wherein said periods of time are defined within data search information (“

DSI”

) contained within program stream packets stored on said DVD.

4. The method as in claim 1 wherein generating further comprises:

determining whether one of said selected portions of video content ends within a transport stream packet body; and

responsively filling the remaining portion of said transport stream packet body with stuffing bytes.

5. The method as in claim 4 further comprising:

modifying the header of said transport stream packet to indicate where said stuffing bytes begin within said packet body.

6. A method for ensuring that a transport stream decoder will consistently generate a still video image from program stream video content read from a DVD comprising:

transmitting one or more frames containing zero motion vectors to said transport stream decoder following said program stream content.

7. The method as in claim 6 wherein said frames are P frames.

8. The method as in claim 6 further comprising:

transmitting transport packets containing stuffing bytes to said transport stream processor following frames containing zero motion vectors.

9. The method as in claim 6 further comprising:

diluting an audio stream associated with said program stream video content by adding stuffing bytes to audio packets within said audio stream.

10. A method for ensuring that a transport stream decoder will consistently generate a still video image from program stream video content read from a DVD comprising:

detecting that consecutive VOBUs read from said DVD contain only navigation (“

NAV”

) packets; and

in response to detecting that consecutive VOBUs read from said DVD contain only NAV packets, supplying one or more null P frames to said transport stream decoder to move still image data into a current frame buffer.

11. The method as in claim 10 further comprising:

supplying said null P frames with PCR timestamps corresponding to SCR timestamps of said NAV packets.

12. A method for ensuring that a transport stream decoder will consistently generate a still video image from program stream video content read from a DVD comprising:

detecting a still video image on said DVD; and

responsively generating a pause signal causing said transport stream decoder to pause on a currently-rendered video image;

setting a timer to a calculated amount of time during which said still image should be displayed; and

responsively generating an un-pause signal causing said transport stream decoder to resume decoding images when said calculated amount of time has passed.