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Digital video signal processing apparatus and method for adaptive y/c separation

一种视频信号处理、视频信号的技术，应用在亮度和色度信号处理电路、彩色信号处理电路等方向，达到消除交叉亮度和交叉色彩、准确边缘检测、改善显示质量的效果

Inactive Publication Date: 2006-08-02
SAMSUNG ELECTRONICS CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these techniques are based on horizontal or vertical one-dimensional filtering, therefore, artifacts may remain in the generated signal due to uncertain edge orientations

Method used

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  • Digital video signal processing apparatus and method for adaptive y/c separation
  • Digital video signal processing apparatus and method for adaptive y/c separation
  • Digital video signal processing apparatus and method for adaptive y/c separation

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Embodiment Construction

[0033]FIG. 3 is a block diagram of a video signal processing device 300 according to an embodiment of the present invention. Referring to FIG. 3 , a video signal processing device 300 includes a memory 310 , a weight determination unit 320 , a 2D BPF (two-dimensional bandpass filter) 330 , and a subtractor 340 . The video signal processing apparatus 300 can be used for both the NTSC system (in NTSC mode) and the PAL system (in PAL mode). The video signal processing apparatus 300 receives a digital CVBS signal as an input video signal, and separates Y and C signals. The input video signal can be passed at a predetermined frequency 4f sc A digital signal obtained by sampling the active video area of ​​an analog CVBS signal, where f sc is the subcarrier frequency.

[0034] The input video signal (CVBS(t)) in NTSC format can be expressed in Equation 1 as follows:

[0035] [Formula 1]

[0036] CVBS(t)=Y+U*sin 2πf SC t+V*cos 2πf SC t

[0037] where U and V are the compo...

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Abstract

The present invention provides an adaptive digital video signal processing apparatus and method for Y / C separation. In the video signal processing apparatus, an adaptive 2D BPF carries out Y / C separation through comb filtering and bandpass filtering selected according to local characteristics of an image (e.g., based on the direction in which an edge in the image extends in vertical and horizontal directions. The adaptive 2D BPF performs 2D bandpass filtering in general case. The 2D BPF adaptively executes a series of selections of the various filtering operations in a continuous manner.

Description

technical field [0001] The invention relates to a digital video signal processing device, in particular to a digital video signal processing device and method for two-dimensional Y / C separation. Background technique [0002] A video signal intended for television (TV) broadcast consists of two mixed main parts, luma Y (creating a black and white picture with full detail) and chroma C (coloring with no detail at all). This method is used instead of the red, green and blue sub-signals in order to obtain the best visual picture that can be transmitted in the limited bandwidth of the broadcast channel. Every TV receiver and VCR must contain filters to separate brightness and color (Y and C) again. A not perfect Y / C splitter will lose resolution - horizontally, vertically or both. Additionally, there are artifacts such as rainbow swirls where pinstripes should be and crawling dots where patches of different colors meet. [0003] Thus, displays using color television signals tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/77H04N9/64
CPCH04N9/78
Inventor 朴成哲任炯俊朴宰弘任庆默卞孝真权义真
Owner SAMSUNG ELECTRONICS CO LTD