MPEG-2 Encoder Preprocessor for Split Screen Image Processing of Digital TV (HDTV) and High Definition TV (HDTV)

摘要

The present invention relates to an MPEG-2 (MPEG-2: Moving Picture Expert Group 2) encoder pre-processing apparatus for split-screen image processing of digital television (DTV) and high definition television (HDTV). The DTV image signal is separated into a luminance signal (Y) and a chrominance signal (C) by using the timing reference signal in the signal, and is output. Signal separation and synchronization signal detection means (10); HDTV, which is the same type as the luminance signal (Y), the chrominance signal (C), and the DTV synchronization signal, which is the input signal of the signal separation and synchronization signal detecting means 10, and is suitable for the size of the HDTV split screen. Multiplexing means (20) for receiving a synchronization signal and selecting and outputting a DTV video signal or an HDTV video signal by a selection signal input from the outside; And receiving the output of the multiplexing means 20 and performing image processing such as 4: 2: 2/4: 2: 0 conversion, adaptive filtering, etc. by using the synchronous signal with the luminance signal Y and the color difference signal C. And the image processing means 30 for outputting the processed luminance signal Y, the color difference signal C, and generating and outputting the scene change detection signal and other signals required by the image compression unit. Since the amount of data is very large (1,920 pixels × 1,080 lines) and very fast (74.25 MHz), most of the MPEG-2 encoder system for HDTV divides the screen so that it is easy to compress a video by inputting a video signal. : 2/4: 2: 0 Conversion, pre-processing adaptive filtering, and scene change detection can handle both DTV video and HDTV split screen video, so there is no need to develop a separate pre-processing device for DTV and HDTV. .