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Apparatus, system and method for processing closed captions in digital video signals

A technology for digital video and closed captions, which is used in parts of TV systems, parts of color TVs, TVs, etc.

Active Publication Date: 2018-04-27
BEIJING TIMES OSEE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the present invention proposes a kind of device, system and method for processing the closed caption in the digital video signal, it can solve the problem that cannot utilize the traditional ripe display processor that is used in the field of video signal processing in the prior art. Technical problems in decoding and displaying closed captions in video signals

Method used

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  • Apparatus, system and method for processing closed captions in digital video signals
  • Apparatus, system and method for processing closed captions in digital video signals
  • Apparatus, system and method for processing closed captions in digital video signals

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Embodiment 1

[0051] like figure 1 As shown, the present embodiment provides a method for processing closed captions in digital video signals, including the following steps:

[0052] S1: Acquire digital video signal. In actual use, the digital video signal is generally an SDI digital video signal, such as an SDI digital video signal in the broadcasting industry, and the SDI digital video signal is a serial digital video signal.

[0053] S2: converting the digital video signal into a parallel signal with the same format and synchronization as the digital video signal. Since the processing speed of parallel data is much higher than that of serial data, the serial digital video signal is converted into the same format and synchronized parallel signal to improve the processing speed.

[0054] S3: Extracting a closed caption signal from the digital video signal, and generating a first signal with the same frequency as the digital video signal. Since the closed caption is a standardized coding...

Embodiment 2

[0064] like figure 2 As shown, the present embodiment provides a device for processing closed captions in digital video signals, including:

[0065] The signal acquiring unit 1 is used for acquiring digital video signals. In actual use, the digital video signal is generally an SDI digital video signal, such as an SDI digital video signal in the broadcasting industry, and the SDI digital video signal is a serial digital video signal.

[0066] The signal conversion unit 2 is used to convert the digital video signal into a parallel signal with the same format and synchronization as the digital video signal. The signal conversion unit 2 can be realized by FPGA.

[0067] The signal extraction and generation unit 3 is used to extract the closed caption signal in the digital video signal, and generate a first signal with the same frequency as the digital video signal. The first signal may be a standard-definition digital signal, such as a 480I60 signal.

[0068] The signal embed...

Embodiment 3

[0074] like image 3 As shown, the present embodiment provides a system for processing closed captions in digital video signals, the system includes a front-end signal processing module and a digital-to-analog conversion module connected to each other, wherein,

[0075] The front-end signal processing module includes:

[0076] The signal acquiring unit 1 is used for acquiring digital video signals. In actual use, the digital video signal is generally an SDI digital video signal, such as an SDI digital video signal in the broadcasting industry, and the SDI digital video signal is a serial digital video signal.

[0077] The signal conversion unit 2 is used to convert the digital video signal into a parallel signal with the same format and synchronization as the digital video signal. This signal acquisition unit 1 and signal conversion unit 2 can be realized by FPGA, and specific process is: obtain digital video signal by FPGA, and convert this digital video signal into describ...

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Abstract

The present invention provides a device, system and method for processing closed captions in digital video signals, which converts digital video signals into parallel signals of the same format and synchronization; extracts closed caption signals in digital video signals, and generates a The first signal of the same frequency as the digital video signal, embedding the closed caption signal into the first signal; converting the first signal embedded in the closed caption signal into a subtitle analog signal; sending the parallel signal and the subtitle analog signal to display processing device. Because in the prior art, most of the display processors that decode the closed caption signal in the digital video signal can only decode the closed caption signal in the analog signal, extract the closed caption signal and re-embed it into the first signal, and The first signal is converted into an analog signal and then decoded, so that the closed caption signal encoded in the digital video signal can be decoded and displayed by a display processor in the prior art.

Description

technical field [0001] The invention relates to the technical field of video display, in particular to a device, system and method for processing closed captions in digital video signals. Background technique [0002] Video signals often carry closed captions (Closed Caption, CC) during the transmission process. CC subtitles are text versions of TV, movie and computer image explanations. In addition to dialogue, they also include information such as sound and music descriptions of objects in the film. . CC subtitles were originally developed for hearing-impaired users, usually appearing at the bottom of the screen, but today they are very useful in many other situations, for example: in noisy environments such as airports, when the sound cannot be heard clearly You can read CC subtitles; or in a quiet environment such as a hospital, you can also read CC subtitles. CC subtitles are a standardized encoding method that embeds text information into the hidden layer data of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/445H04N5/278H04N7/01H04N21/431H04N21/488
Inventor 何德文徐道武
Owner BEIJING TIMES OSEE TECH CO LTD
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