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Equipment and method for detecting telecast commutation

A technology for TV programs and programs, applied in color TV parts, TV system parts, TV and other directions, can solve problems such as failure, and achieve the effect of wide application range and accurate test results

Inactive Publication Date: 2008-05-07
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this judgment is invalidated when two consecutive programs have subtitles

Method used

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  • Equipment and method for detecting telecast commutation
  • Equipment and method for detecting telecast commutation
  • Equipment and method for detecting telecast commutation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The device 10 for detecting TV program conversion of the present invention, such as figure 1 As shown, it includes: demodulator 101, which receives TV program signals; demultiplexer 102, which separates subtitle signals from audio and video signals; subtitle decoder 103, which is used to decode subtitle signals and extract stable subtitle attribute information; user interface 105, the user designates the target program that wishes to be detected continuously; the controller 106, after receiving the user instruction, stores the stable subtitle attribute of the designated target program in the target program attribute buffer 108, and makes the comparator 107 start working; compare A device 107 is used to analyze and compare the stable subtitle attributes of the target program and the current program decoded at any time, and output a prompt signal when it is detected that the program is switched.

[0052] The subtitle object parsed by the subtitle decoder 103 is a bitmap o...

Embodiment 2

[0080] In addition, since the device for detecting TV program switching only works by judging the change of the stable subtitle attribute, it can also be replaced by an independent subtitle attribute extractor 113 figure 1 In the usual subtitle decoder 103, its structural diagram is as follows Figure 11 An apparatus 12 for detecting television program transitions is shown. From Figure 11 It can be seen that the device 12 for detecting TV program conversion includes: a demodulator 101, which receives TV program signals; a demultiplexer 102, which separates subtitle signals from audio and video signals; subtitle attribute extractor 113, which is used to extract Stable attribute information in the subtitle stream; user interface 105, the user specifies the target program that wishes to be detected continuously; controller 106, after receiving the user instruction, stores the stable subtitle attribute of the specified target program in the target program attribute buffer 108 ,...

Embodiment 3

[0087] In addition, in Example 1, as figure 1 The shown device for detecting a change of television program operates independently of the television set. Of course, it can also be set inside the digital TV and integrated with the digital TV, such as Figure 12 shown. Figure 12 The shown TV set 20 has: a demodulator 101, which receives TV program signals; a first demultiplexer 102, which separates subtitle signals from audio and video signals; subtitle decoder 103, which decodes subtitle signals and extracts stable subtitle attribute information User interface 105, the target program is designated by the user; Controller 106 stores the stable subtitle attribute of the designated target program, and makes the comparator start to work; Output prompt signal during conversion; Warning generator 109, it produces a warning prompt user target program arrival; Audio-video decoder 111, audio frequency and video are decoded; Loudspeaker, receives audio signal and plays sound; Display ...

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Abstract

The present invention relates to a device and a method which are used to detect the switching of television programs. The device includes a demodulator, a demultiplexer, a caption decoder, a user interface, a controller and a comparator, wherein, the demodulator receives television program signals, the demultiplexer separates caption signals from audio and video signals, the caption decoder decodes the caption signals and extract stable caption attribute information, the user interface is used for a user to specify a target program, the controller stores the stable caption attributes of the specified target program and activates the comparator to operate, and the comparator analyzes and compares the change of the stable caption attributes and exports prompt signals when the switching of programs is detected. The device of detecting the switching of television programs of the present invention can judge the change of programs by detecting the change of the stable caption attributes, so the device can detect not only the situation that one of two continuous programs has caption attributes, but also the situation that all of the two continuous programs have caption attributes.

Description

technical field [0001] The invention relates to a device and a method for detecting TV program conversion, and a TV set and a video recorder with the function of detecting TV program conversion. Background technique [0002] Using the TV program change judging technology in the TV receiver can help the user not have to wait for the TV all the time, but can enjoy the selected program without omission through its reminder. Detecting commercials is an example of such an application. In addition to analyzing the time and spatial statistical characteristics of audio and video signals, subtitle signals embedded in TV signals are also used to distinguish TV programs. [0003] Japanese Patent Laid-Open No. 08-096441 proposes a method for detecting advertisements. It relies on detecting whether the subtitle signal in the analog TV signal exists to make a judgment. If one of the commercial program and the desired program selected by the user has a subtitle signal and the other does...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/44H04N5/445H04N5/00H04N17/00
Inventor 吕越峰藤井由纪夫寺田光一
Owner HITACHI LTD
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