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Vehicle-mounted digital television signal processing method

A technology of digital TV signal and processing method, which is applied in the direction of TV, color TV, color TV parts, etc., and can solve problems such as system instability, readjustment, and large processing capacity

Inactive Publication Date: 2010-02-03
HANGZHOU XINYUAN ELECTRONICS RES INST
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Problems solved by technology

But neither of them can be readjusted at runtime to give a new response. The FIR structure needs to recalculate all the impulse response coefficients, which requires a large amount of processing; while the IIR uses a recursive structure, making the entire system There is instability

Method used

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  • Vehicle-mounted digital television signal processing method

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Embodiment Construction

[0057] The present invention is preferably specifically described below through examples, but the protection scope of the present invention is not limited thereto.

[0058] A method for processing a vehicle-mounted digital television signal, comprising processing a video signal and processing an audio signal respectively, wherein the processing of the video signal includes the following steps:

[0059] (1) Detection of motion areas: The video signal is composed of continuous image frames. Firstly, each image frame is divided into 36 blocks of 6×6, and the average value of the color attributes of each pixel in the block is calculated one by one, and then compared with the previous image The average value of the color attributes of each pixel in the corresponding block of the frame is compared; if the difference between the average value of the color attributes of the two blocks is less than the threshold value, the block is judged to be a static block; otherwise, the block is ju...

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Abstract

The invention relates to a vehicle-mounted digital television signal processing method which respectively comprises steps of processing for video signals and the processing for audio signals. The processing for video signals comprises the following steps: (1) detecting moving regions: firstly, uniformly dividing all image frames into 36 blocks (6 lines and 6 rows), calculating the color attributeaverage value of each pixel point in each block one by one, and comparing the obtained color attribute average value with the color attribute average value of each pixel point of the corresponding block of the previous image frame, wherein if the difference value of the color attribute average values of the two blocks is smaller than the threshold value, the block is a static block, and if the difference value of the color attribute average values of the two blocks is not smaller than the threshold value, the block is a moving block, and all adjacent blocks of the block are moving blocks; (2)processing the static blocks in the image frames by average filtering; and (3) processing the moving blocks in the image frames by time-domain noise reduction. The vehicle-mounted digital television signal processing method processes the video signals by self-adapting noise reduction, thereby effectively reducing the noise, avoiding the loss of space details and improving the output effect of thevideo signals.

Description

(1) Technical field [0001] The invention relates to a signal processing method of a vehicle-mounted digital television. (2) Background technology [0002] There are three main digital TV terrestrial broadcasting standards in the world: DVB-T (Digital Video Broadcasting-Terrestrial) in Europe, ATSC (Advanced Television Systems Committee) in the United States and ISDB-T (Integrated Service es Digital Broadcasting Terrestrial) in Japan (Integrated Service Digital Broadcasting) . DVB-T is a relatively new standard in the European DVB series standards (in addition to cable digital TV standard DVB-C, and satellite digital TV standard DVB-S), and is also the most complex DVB transmission system. This standard was approved in February 1998. The core of the DVB-T standard is MPEG-2 digital video and audio compression coding, which adopts coded orthogonal frequency division multiplexing COFDM (Coded Orthogonal Frequency Division Multiplexing) modulation mode, which is suitable for 8...

Claims

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Application Information

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IPC IPC(8): H04N5/21H04N5/60
Inventor 曹胜强
Owner HANGZHOU XINYUAN ELECTRONICS RES INST
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