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Control field event detection in a digital video recorder

A technology for controlling fields and numbers, applied in the field of digital video recorders, which can solve the problems of not being able to use video processing methods, and solutions that are not completely satisfactory

Inactive Publication Date: 2005-08-31
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional scheme is not entirely satisfactory because it requires a human to wait while the system returns to the start of the segment in order to mark the commercial, and it uses tape sync or event / start / stop pulse encoding
Also, because conventional VCRs do not use MPEG-type encoding, they cannot take advantage of more sophisticated video processing methods that can be used to detect video program transitions that may occur, for example, during commercial breaks

Method used

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  • Control field event detection in a digital video recorder
  • Control field event detection in a digital video recorder
  • Control field event detection in a digital video recorder

Examples

Experimental program
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Embodiment Construction

[0014] figure 1 is a block diagram of a digital video recording system 100 that can be used in accordance with aspects of the present invention. A system controller, such as microprocessor 120, can be used to control the operation of the system and perform selected signal processing tasks. Microprocessor 120 can preferably include associated high speed memory (not shown), since high speed memory is customary for such devices. Control input for the microprocessor 120 can be received from a user interface 130 via a control buffer 128 . Microprocessor 120 is capable of communicating with various system components, as will be described subsequently using system bus 126 . figure 1 In , connections to the system bus 126 from each of the various components are omitted from this figure for clarity.

[0015] System 100 can include an RF tuner section 102 for receiving and down converting an RF video signal. The RF tuner section is capable of converting a selected channel of analog ...

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PUM

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Abstract

The invention concerns a method and system for identifying commercial message segments of a video signal. A set of rules is applied for determining the occurrence of commercial messages with a higher degree of accuracy as compared to conventional methods. In general, method includes the steps of monitoring a digital bit stream (402) comprising the video signal, detecting a change in a control field (404) of the digital bit stream, and then selectively generating a commercial event notification (410) responsive to the detecting step. According to one aspect of the invention, a change in at least one of a video sequence header and a sequence display extension can be detected. Alternatively, or in addition to checking for a change in control field, the method can comprise the step of detecting a change in an informational parameter of the video signal exclusive of the audio-visual content.

Description

technical field [0001] This invention relates to digital video recorders, and more particularly to methods and apparatus for eliminating commercial breaks from video programming. Background of the invention [0002] Various devices have been developed to enable consumers to record video and / or audio programming for later display. Such devices include magnetic tape recorders, video cassette recorders, recordable CDs, and most recently recordable digital video disks (DVDs). Hard disk drives and magneto-optical disks are also already in use. [0003] A desirable feature for MPEG media recorders is the ability to automatically identify and selectively skip segments of a recorded video signal. For example, such a feature could be used to automatically redact commercial information from recorded broadcast television signals. An important feature in the field of video cassette recorders is commercial skipping. In this regard, various systems in the range of video recorders have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/92H04N5/76H04N7/16H04N9/79
CPCH04N21/4334H04N9/7921H04N7/16H04N21/4147H04N21/44008H04N21/4325H04N21/4627H04N21/84H04N21/812H04N5/76H04N5/91
Inventor 约瑟夫·C·恩格尔阿金耶米·奥杜特拉
Owner THOMSON LICENSING SA