A graphic OSD controller integrated into video processing chip

A video processing and controller technology, applied in the field of graphic OSD controllers, can solve the problems of large storage space and system resources, occupation, complexity increase, etc., and achieve the requirements of saving storage resources, simple structure design, and reducing storage space requirements. Effect

Inactive Publication Date: 2008-03-26
XI AN JIAOTONG UNIV
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Problems solved by technology

At the same time, due to the increasing complexity of graphics OSD controller de

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  • A graphic OSD controller integrated into video processing chip
  • A graphic OSD controller integrated into video processing chip
  • A graphic OSD controller integrated into video processing chip

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[0038] Referring to Figure 1, the graphics OSD controller integrated in the video processing chip of the present invention has an internal basic structure including a bitmap data decompression module, a storage operation control module, a programmable color mapping module, an OSD image scaling module, and an OSD image display management Module, register operation management module and MCU interface module; the user sets each register and control parameter output of the register operation control module through the MCU interface, thereby completing various functions such as storage operation, color mapping and display synthesis.

[0039] After bitmap data is compressed, it can effectively reduce the storage space requirements for off-chip bitmap data. The bitmap data decompression module is used to decompress OSD data into bitmap index data. The data compression uses an improved run-length coding (BLE) algorithm, and the compression part is implemented by software.

[0040] The sto...

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Abstract

The invention discloses a OSD controller of images integrated on a video processing chip, which is composed of a bitmap data decompression module, a memory operation control module, a programmable colour mapping module, a OSD image scaling module, an image display management module, a register operation management module and a MCU interface module; through one of serial I2C and parallel work modules provided by the MCU interface module, setting display parameters and operation parameters of the register operation management module, thereby controlling storage, display of OSD data and reading status of the OSD controller; according to setting parameters of the OSD controller, the OSD image display management module controlls the superposition mode of multilayer image OSD data, the mixed mode of OSD images and original video signals, dispaly window size of OSD images and display characteristics, etc.; utilizing off-chip SDRAM as a dispaly memory of image data, utilizing on-chip double port RAM as a control memory of image operation, being convenient to integrate and share resoure with the video processing system.

Description

technical field [0001] The invention belongs to the technical field of digital video image processing and display, and in particular relates to a graphics OSD controller integrated in a video processing chip. Background technique [0002] The OSD controller is an indispensable part of the video display processing system. It can provide multiple language interfaces so that users can adjust the characteristics of all video display images through various function menus. The early OSD system was mainly based on the display of character units, which was characterized by a single color, fixed size, and relatively simple menu design patterns. With the rapid development of digital video processing technology, various advanced and complex algorithms are applied to video processing chips to provide consumers with clearer and smoother video images. At the same time, people have higher and higher requirements for OSD menus. OSD controllers displayed in bitmaps have become the mainstrea...

Claims

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Application Information

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IPC IPC(8): H04N5/445
Inventor 郑南宁孙宏滨杨小露葛晨阳王东任鹏举刘伟李珺珂李仁男
Owner XI AN JIAOTONG UNIV
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