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Apparatus and method for signal processing in digital video system

A signal processing device, a technology of digital video, which is applied to components of TV systems, luminance and chrominance signal processing circuits, high-definition TV systems, etc., and can solve problems such as difficulty in quantization levels

Inactive Publication Date: 2004-01-14
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

On the other hand, in terms of circuit implementation or price, it is quite difficult to increase the quantization level of more than 8 bits for expressing the luminance (Y) or chrominance signal (Cb, Cr) of a pixel

Method used

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  • Apparatus and method for signal processing in digital video system
  • Apparatus and method for signal processing in digital video system
  • Apparatus and method for signal processing in digital video system

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Embodiment Construction

[0025] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

[0026] FIG. 1 is a circuit diagram showing a signal processing device of a digital video system according to the present invention. Referring to Fig. 1, the signal processing device of digital video system comprises a NAND gate 10, a decoder 12, a pulse generator 14, a selector 16, a first AND gate 20, a second AND gate 22 and an adder twenty four.

[0027] NAND gate 10 receives the upper 8 bits from S2 to S9, while decoder 12 receives the lower bits of S0 and S1. Here, S0 to S9 are processed by A / D conversion, and display an image signal that has been digitally processed into 10 bits.

[0028] The decoder 12 outputs the values ​​shown in Table 1 to the output terminals X2, X1 and X0 according to the change of the input bit values ​​of S0 and S1.

[0029] S1 S0

X2

X1

X0

0 0

0

0

0

...

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Abstract

An apparatus and a method for signal processing in a digital video system. The apparatus for signal processing of a digital video system has: an input unit to receive a signal quantized for M bits; and an output unit to output a value of A for (2-B)times and a value of A+1 for B times during vertical scan of 2times when a decimal value of high N bits is A and a decimal value of low bits of (M-N) excluding N bits is B and M>N. Accordingly, as an image signal quantized with a greater number of bits is displayed on a screen with a lesser number of bits, the quality of a picture can be improved.

Description

technical field [0001] The present invention relates to a device and method for signal processing in a digital video system, in particular to an image signal used in a digital video system that can be displayed with fewer bits and quantized with more bits Apparatus and method for signal processing of loss minimization. This application is based on Korean Patent Application No. 2002-40599, which is incorporated herein by reference. Background technique [0002] In a digital video system such as DTV (Digital TV), A / D conversion (analog-to-digital conversion) of digitally encoding an analog input signal is required in order to display images on a screen. [0003] A / D conversion processing is used to convert continuously changing analog image or voice signals into discrete digital signals. The sampling frequency and the number of quantized bits in the A / D conversion process affect the quality of images and sounds and the amount of information in digital video systems. In othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/66H03M1/68H03M1/82H04N9/77
CPCH03M1/822H03M1/68H04N9/77
Inventor 康虎雄
Owner SAMSUNG ELECTRONICS CO LTD
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