Method for processing video signal and video processing unit

A video signal and video processing technology, applied in the conversion field of different up-conversion algorithms, can solve the problems of generating artifacts and reducing image quality, and achieve the effect of avoiding artifacts and displaying motion smoothly.

Inactive Publication Date: 2004-05-12
PANASONIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also due to fine horizontal lines in OSD image data, up-conversion may produce annoying artifacts such as line flickering in OSD image areas
[0023] Therefore, the problem arises that the processing of a video signal on which additional image data is superimposed may produce artifacts and reduce the perceived image quality

Method used

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  • Method for processing video signal and video processing unit
  • Method for processing video signal and video processing unit
  • Method for processing video signal and video processing unit

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Embodiment Construction

[0070] The invention provides a method and a processing unit for differently processing separate image regions of a video signal. special reference Figure 13 In accordance with the control signal indicating the insertion position of the additional image data, the additional image data is superimposed on the video image of the received video signal (steps s1, s2).

[0071] The video signal including the additional image is processed according to the control signal (step s3) and the processed video signal is output (step s4), preferably for display on a display device. The superimposed image data and the video data surrounding the superimposed image can be processed differently based on the control signal. In contrast, with uniform image processing, artifacts can always be avoided by using appropriate image processing methods.

[0072] A device according to the invention is Figure 14 described in. Video signal 50 and image data 51 are applied to mixer 52 . The mixer 52 supe...

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Abstract

A method and an apparatus for processing a video signal is provided for processing an input video signal comprising a plurality of subsequent video images. An additional image is superimposed on the input video signal in accordance with a control signal for producing a mixed video signal. Said control signal indicates the image area for superimposing the additional image. The mixed video signal is subsequently processed by a processing circuit in accordance with the control signal. The control signal indicates a different processing for separate image areas. In that way, a video signal, which has additional image data superimposed thereon may be processed without the occurrence of artifacts originating from a uniform processing of the mixed video signal.

Description

technical field [0001] The invention relates to a method for processing video signals and a video processing unit using the method. The invention particularly relates to a pixel-based conversion of different up-conversion algorithms. Background technique [0002] A video signal usually consists of a succession of sub-sequences of images. These images are transmitted in frames in the case of progressive video signals or in fields in the case of interlaced video signals. A field consists of odd or even lines of a video frame, and two fields must be transmitted in order to transmit information for one frame. Common television standards today, namely PAL, SECAM or NTSC, transmit video signals comprising fields with a field rate of 50 Hz or 60 Hz, respectively. [0003] For displaying video signals, the most commonly used display device is still a cathode ray tube screen (CRT) due to its good price / performance ratio. A small or medium sized CRT screen ...

Claims

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Application Information

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IPC IPC(8): H04N5/262G09G5/00H04N5/265H04N5/44H04N5/445H04N5/45H04N7/01
CPCH04N7/012H04N7/013H04N5/265H04N5/45H04N21/44008H04N5/44591H04N21/440281H04N21/440218H04N7/014H04N21/4316H04N21/47
Inventor 斯文·萨尔泽弗兰克·詹森
Owner PANASONIC CORP
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