KR970058043A - NTSC / ARM (NTSC / PAL) automatic switching device - Google Patents

Abstract

The present invention relates to an apparatus and method for reproducing an NTSC signal using an RGB (Red, Green, Blue) encoder in a multi-VCR (Multi Video Cassette Recorder) A composite video signal processor for processing an input composite video signal to conform to NTSC and PAL modes, a synchronous signal generator for generating a reference synchronous signal to the composite video enhancement processor, A mode selection criterion determiner for outputting a selection criterion signal for determining an NTSC / PAL mode, a microcomputer for determining the NTSC / PAL mode according to a selection criterion signal outputted from the fraud mode selection criterion determiner, A phase processor for changing the phase of a signal output from the composite video signal processor under the control of the microcomputer, Comprises a processing unit and a portion the composite video signal output amplifying NTSC / PAL BPF, and a signal output from the NTSC / PAL BPF which a signal output from the processing unit for amplifying the band-pass filter to match the output level

Description

NTSC / ARM (NTSC / PAL) automatic switching device

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a configuration diagram of an NTSC / PAL automatic switching device according to the present invention,

FIG. 2 is a flow chart showing an operation of an NTSC / PAL automatic switching apparatus according to the present invention;

Claims (6)

A composite video signal processing unit 1 for processing the input composite video signal according to NTSC and PAL modes, a synchronous signal generating unit 2 for outputting a reference synchronous signal to the composite video signal processing unit 1, and determining an NTSC / PAL mode PAL mode according to the selection reference signal outputted from the mode selection criterion determining unit 2, and controls the composite video signal processor 1 to be controlled A phase processing unit 3 for changing the phase of a signal output from the composite image processing unit 1 under the control of the microcomputer 6, a phase processing unit 3, and a composite video signal processing unit 1 An NTSC / PAL BPF 4 for band-pass filtering a signal output from the NTSC / PAL BPF 4, and an output amplifier 6 for amplifying a signal output from the NTSC / PAL BPF 4 to an output level, ≪ / RTI > NTSC / PAL auto-changer, characterized in that. The composite video signal input buffer (1) according to claim 1, wherein the composite video signal processing unit (1) comprises a composite video signal input buffer (11) for buffering the input composite video signal, A chrominance processing and luminance matrix 12 for processing a chrominance signal on the basis of a composite video signal input from the chrominance processor and the luminance metric 2 in accordance with the control of the microcomputer 6, A VCO controller 14 for generating a phase burst for a PAL mode by inputting an output of the VCO 13, a VCO controller 14 for generating a phase burst for a PAL mode, PAL BPF 4 by generating an RY burst and a BY burst according to a reference synchronization signal output from the mode selection criterion determining unit 2, with the outputs of the chrominance processor 14, the chrominance processor, and the luminance matrix 12 as inputs, To A RY and BY burst generating unit 15 for outputting a Y signal and a signal output from the color difference processor and the luminance matrix 12 as input, A RY and BY clamp unit 16 for changing the color difference component ratio of the PAL to output to the phase processing unit 3, and a delay unit for delaying the output of the color difference processor and the luminance matrix 2 to provide timing for output synchronization, And a relay unit (17) which performs clamp driving to output to the NTSC / PAL BPF (4) and performs a trigger function of the mode selection criterion determining unit (2). The VCO according to claim 2, wherein the VCO (13) receives the output of the chrominance processor and the luminance matrix (2) under the control of the microcomputer (6) Frequency signal to the NTSC / PAL automatic switching device. The method of claim 2, wherein the VCO controller 14 NTSC / PAL auto-changer, characterized in that for generating a burst phase of 22.5 ^{/ 135.} For the PAL mode to the output of the VCO (13). 2. The method of claim 1, wherein the mode selection criterion determining unit (2) comprises a synchronizing signal generating unit (21) for generating a synchronizing signal, a latch signal generating unit A latch lamp generating unit 22 for outputting a reference synchronizing signal to the video signal processing unit 1 and an output of the synchronizing signal generating unit 21 according to a trigger signal outputted from the composite video signal processing unit 1 And a synchronous detector (23) for synchronously detecting and outputting the detected sync signal to the microcomputer (11). 2. The apparatus according to claim 1, wherein the phase processing unit (19) comprises a PAL / NTSC switching unit (3) for phase-shifting signals output from the composite video signal processing unit (1) according to the NTSC and PAL modes under the control of the microcomputer And a chroma amplifier 32 for amplifying a color difference signal output from the composite video signal processor 1 according to an output of the switching unit 31 and outputting the amplified chrominance signal to the NTSC / PAL BPF 4 And an NTSC / PAL automatic switching device. ※ Note: It is disclosed by the contents of the first application.