Source: http://www.google.com/patents/US7174086?dq=6078894
Timestamp: 2014-10-31 12:14:36
Document Index: 724179074

Matched Legal Cases: ['art 200', 'art 300', 'art 200', 'art 300', 'art 200', 'art 300']

Patent US7174086 - Trick mode using dummy predictive pictures - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe invention concerns a method (200) or (300) and system (100) for performing a trick mode on a video signal containing a plurality of progressively scanned original pictures. The method (200) includes the steps of: selectively repeating (214) at least one of the original pictures to convert the video...http://www.google.com/patents/US7174086?utm_source=gb-gplus-sharePatent US7174086 - Trick mode using dummy predictive picturesAdvanced Patent SearchPublication numberUS7174086 B2Publication typeGrantApplication numberUS 10/078,909Publication dateFeb 6, 2007Filing dateFeb 19, 2002Priority dateOct 23, 2001Fee statusPaidAlso published asCN1575596A, CN100496110C, EP1440575A1, EP1440575A4, US20030077068, WO2003036966A1, WO2003036966B1Publication number078909, 10078909, US 7174086 B2, US 7174086B2, US-B2-7174086, US7174086 B2, US7174086B2InventorsShu Lin, Donald Henry WillisOriginal AssigneeThomson LicensingExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (1), Classifications (24), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetTrick mode using dummy predictive picturesUS 7174086 B2Abstract The invention concerns a method (200) or (300) and system (100) for performing a trick mode on a video signal containing a plurality of progressively scanned original pictures. The method (200) includes the steps of: selectively repeating (214) at least one of the original pictures to convert the video signal to a trick mode video signal in response to a trick mode command; and the step of selectively inserting (216) at least one dummy predictive picture in the trick mode video signal. In addition, the method (300) can include the step of monitoring (316) the trick mode video signal so that the dummy predictive picture is selectively inserted when the bit rate exceeds a predetermined threshold. Certain pictures in the trick mode video signal can also be modified (220) (328) to reflect an intended display order.
CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation of provisional patent application Ser. No. 60/334,914, filed Oct. 23, 2001, and claims the benefit of the filing date thereof.
SUMMARY OF THE INVENTION The present invention concerns a method of performing a trick mode on a video signal containing a plurality of progressively scanned original pictures. The method includes the steps of: in response to a trick mode command, selectively repeating at least one of the original pictures to convert the video signal to a trick mode video signal; and selectively inserting at least one dummy predictive picture in the trick mode video signal. In one arrangement, the method can also include the steps of: monitoring the trick mode video signal; and selectively inserting at least one dummy predictive picture in the trick mode video signal if the bit rate of the trick mode video signal exceeds a predetermined threshold.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a system that can perform a trick mode using dummy predictive pictures in accordance with the inventive arrangements herein.
In operation, the controller 110 can read a video signal containing a plurality of progressively scanned original pictures from the storage medium 112. For convenience, the phrase �progressively scanned original pictures� will be shortened to �original pictures� throughout the application. In one arrangement, if the microprocessor 116 receives a trick mode command such as a slow motion or freeze command, then the microprocessor 116 can selectively repeat at least one of the original pictures to convert the video signal to a trick mode video signal. Thus, the trick mode video signal can contain the original pictures as well as duplicates of certain original pictures, or repeated original pictures.
Trick Mode Using Dummy Predictive Pictures FIG. 2 illustrates a flowchart 200 that demonstrates one way in which a trick mode using dummy P pictures can be performed. In one arrangement, the invention can be practiced in a remote decoder arrangement. For purposes of the invention, a remote decoder arrangement can be any system in which at least a portion of the pictures in a video signal can be decoded by a decoder that is external to and not under the control of a bitstream source that is providing the pictures to the decoder. As an example, the bitstream source can be an optical storage medium player or recorder, such as a digital video player or recorder, that reads multimedia data from an optical storage medium and transfers this data over a transmission channel to a digital television, which contains its own decoder. It is understood, however, that the invention is not limited to this example or even a remote decoder arrangement, as the invention can be practiced in any other suitable system or arrangement.
Referring to FIG. 3, a flowchart 300 represents an alternative to the trick mode discussed in the flowchart 200. As shown in flowchart 300, steps 310�314 are nearly identical to steps 210�214 in the flowchart 200 and, accordingly, warrant no discussion here. The only difference is that if no pictures are to be repeated as determined at decision block 313, then the flowchart 300 can continue at step 324. At step 316, during the trick mode command, the bit rate of the trick mode video signal can be monitored. Monitoring the bit rate may be necessary during a trick mode because several pictures in the video signal may be repeated one or more times thereby resulting in an increased bit rate. In certain cases, this increased bit rate may exceed the maximum allowable bit rate for the transmission channel that is carrying the video signal. For purposes of the invention, this maximum allowable bit rate for the transmission channel can be referred to as a predetermined threshold.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5835672Sep 20, 1993Nov 10, 1998Sony CorporationApparatus for coding and decoding a digital video signal having duplicate pictures and frames with fields originating from different film source framesUS5867625Sep 29, 1995Feb 2, 1999Thomson Consumer Electronics, Inc.Digital VCR with trick play steam derivationUS5922048Dec 11, 1998Jul 13, 1999Matsushita Electric Industrial Co., Ltd.Video-on-demand system capable of performing a high-speed playback at a correct speedUS6009229Jul 26, 1996Dec 28, 1999Sony CorporationData coding/decoding method and apparatus and coded data recording mediumUS6034731Aug 13, 1997Mar 7, 2000Sarnoff CorporationMPEG frame processing method and apparatusUS6219381May 22, 1998Apr 17, 2001Kabushiki Kaisha ToshibaImage processing apparatus and method for realizing trick playUS6233392Feb 13, 1998May 15, 2001Thomson Consumer ElectronicsConstrained encoded motion vectorsUS6865747 *Mar 31, 2000Mar 8, 2005Digital Video Express, L.P.High definition media storage structure and playback mechanism* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7899924Feb 19, 2003Mar 1, 2011Oesterreicher Richard TFlexible streaming hardwareClassifications U.S. Classification386/346, 386/E05.052, 386/E09.013International ClassificationH04N5/783, G11B20/12, H04N5/85, H04N5/92, G11B20/10, H04N9/804, H04N7/26, H04N5/76, G06T9/00, H04N5/91Cooperative ClassificationH04N9/8042, H04N5/783, H04N5/775, H04N5/85, H04N21/4325, G06T9/004, H04N21/440281European ClassificationH04N21/4402T, H04N21/432P, G06T9/00P, H04N5/783Legal EventsDateCodeEventDescriptionJul 9, 2014FPAYFee paymentYear of fee payment: 8Jul 9, 2010FPAYFee paymentYear of fee payment: 4Dec 27, 2006ASAssignmentOwner name: THOMSON LICENSING, FRANCEFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THOMSON LICENSING S.A.;REEL/FRAME:018696/0026Effective date: 20061226Jun 11, 2002ASAssignmentOwner name: THOMSON LICENSING S.A., FRANCEFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIN, SHU;WILLIS, DONALD HENRY;REEL/FRAME:012996/0441Effective date: 20020405RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google