Realizing method of digitized processing TV interlaced scanning format conversion

Abstract

The invention discloses a method for digitally processing television interlaced scanning format conversion. The number of lines per field is increased from 312.5 lines to 416.5 lines through the "4:3 line transformation based on spatial linear interpolation" technology; The field frequency enhancement of static scenes is completed by the "6:4 field transformation of interpolation" technology; the field frequency enhancement of moving scenes is completed by the technology of "6:4 field transformation based on average interpolation between fields"; Judge whether the current scene is moving or still; improve the accuracy of field motion detection by "robust constraint of motion line count"; improve the field frequency of input video by "adaptive 6:4 field transformation based on field motion detection" technology to 75Hz. The invention has the characteristics of simplicity and practicability, less resource occupation, and excellent performance.

Description

1. Technical Field [0001] The invention belongs to the technical field of VLSI design, and particularly relates to a new optimized VLSI implementation method of 50HZ / 75HZ interlaced scanning format conversion in video signal scanning and display format conversion and digital television. 2. Background technology [0002] The traditional analog TV scanning format (PAL system: 50HZ interlaced 625 lines; NTSC system: 60HZ interlaced 525 lines) has two major problems in the image display effect: (1) the image flicker problem caused by the low field frequency; (2) ) The problem of low vertical resolution of the picture due to insufficient number of scan lines in a single field. For this reason, people increase the pixel clock frequency from the original 13.5MHZ to 27MHZ in the back-end display, and improve the screen display by performing a variety of digital processing on the TV signal (interlaced to progressive, frame rate increase, image enhancement, etc.) The clarity. Most of the i...

AI Technical Summary

Problems solved by technology

[0002] The traditional analog TV scanning format (PAL system: 50HZ interlaced 625 lines; NTSC system: 60HZ interlaced 525 lines) has two major problems in the image display effect: (1) The screen flickering problem caused by too low field frequency; (2) ) The vertical resolution of the picture is not high due to the insufficient number of scanning lines in a single field

However, these improved scanning formats cannot solve the above two problems at the same time. For example, in the 50HZ progressive format, the field image of 312.5 lines is reconstructed into a frame image of 625 lines. Although the vertical definition of the picture is greatly improved, the frame rate of 50HZ makes the Large-area flicker still exists; and the 100HZ interlaced format increases the field frequency from 50HZ to 100HZ, which effectively eliminates flicker between fields, but the problems of low vertical resolution and obvious line structure lines have not been resolved

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