KR950030667A - Video signal transmission and reception device and method - Google Patents

Abstract

The present invention provides a system capable of performing transmission processing regardless of whether the TV signal on the transmitting side is a high resolution signal or a low resolution signal and receiving processing regardless of whether the receiving side is a high resolution display unit or a low resolution display unit. On the transmitting side, the divider circuit divides the high resolution TV signal into a plurality of frequency band signals. The signals in each frequency band are converted into signals in the horizontal and vertical low range (low resolution TV signal bands). The converted signal is coded by a coding unit for transmitting the coded signal. At the receiving side, the coded signals multiplexed at the transmitting side are separated and decoded at the decoding unit. The frequency synthesis circuit restores the frequency band of the decoded signal to the original band. The resulting signal is then displayed as high resolution. The low resolution signal is coded and then transmitted, which is decoded at the receiving end. The decoded signal is interpolated in the interpolation circuit. The interpolation signal is then displayed on the high resolution display unit.

Description

Video signal transmission and reception device and method

Since this is an open matter, no full text was included.

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2A is a block diagram of a transmitter related to the present invention, FIG. 2B shows an example of dividing a frequency band by a divider, and FIG. 4 is an encoding unit of FIG. 5 is a block diagram of a decoding apparatus related to the present invention, and FIG. 6 is a block diagram of the decoding unit of FIG.

Claims (13)

An input terminal to which a high resolution TV signal is supplied; An input terminal to which a plurality of low resolution signals are supplied; Division means for dividing the high resolution TV signal into signals of a plurality of frequency bands; Frequency shifting means for obtaining a low frequency signal by frequency shifting the high frequency signal of the divided signal into a specific band; Down-sampling means for down-sampling the low frequency signal and the low frequency signal of the divided signal; Selecting means for selecting the down-sampled signal group or the plurality of low resolution TV signal groups; Coding means for obtaining a plurality of coded signals by coding the respective selected signals; And transmission means for transmitting the plurality of coded signals to a transmission line. 2. The method according to claim 1, wherein the coding means uses the motion vector signal obtained from the low-band signal of the divided signal when coding the signal in another divided band when coding the respective divided signals; And the transmitting means transmits the motion vector signal only as a motion vector signal. The video signal transmitting apparatus according to claim 1, wherein said transmitting means time-division multiplexes a plurality of coded signals obtained from said coding means. The high frequency TV signal of claim 1, wherein the dispensing means comprises: a first signal of horizontal and vertical low frequency, a second signal of horizontal high frequency and vertical low frequency, a third signal of horizontal low frequency and vertical high frequency, and horizontal and vertical high frequency And a video signal transmission apparatus characterized by dividing into a fourth signal. The apparatus of claim 4, wherein the frequency band of the first signal is the same as the frequency band of the low resolution TV signal. 6. The apparatus of claim 5, wherein the frequency shifting means frequency shifts the second signal, the third signal, and the fourth time signal in the same frequency band as the first signal. An input terminal to which a high resolution TV signal is supplied; An input terminal to which a plurality of low resolution signals are supplied; Division means for dividing the high resolution TV signal into signals of a plurality of frequency bands; Frequency shifting means for obtaining a low frequency signal by frequency shifting the high frequency signal of the divided signal into a specific band; Down-sampling means for down-sampling the low frequency signal and the low frequency signal of the divided signal; Selecting means for selecting the down sampled signal group or the plurality of low resolution TV signal groups; Coding means for obtaining a plurality of coded signals by coding the respective selected signals; And transmission means for transmitting the plurality of coded signals to a transmission line. Splitting a high resolution TV signal into a plurality of frequency band signals, frequency shifting each signal in a different frequency band to a particular one of the plurality of frequency bands, down-sampling each TV signal in the particular frequency band High efficiency coding the down-sampled signal to generate a plurality of coded signals; and finally, time division multiplexing the plurality of coded signals to generate a first multiplexed coded signal, and generate a plurality of coded signals. A video signal receiving apparatus for generating a second multiplexed coded signal by performing a high efficiency coding process on a low resolution TV signal and multiplexing the time-divided plurality of coded signals, comprising: receiving means for receiving the first and second multiplexed coded signals; ; Separating means for time division and separating the first multiplexed coded signal to generate a plurality of coded signals; Decoding means for decoding the plurality of coded signals to generate a plurality of video signals; Up-sampling means for up-sampling the plurality of video signals to produce a plurality of up-sampled video signals; Frequency shifting means for frequency shifting the frequency shifted up-sampling video signal of the plurality of up-sampled video signals into an original frequency band; And synthesizing means for synthesizing the frequency shifted video signal with the frequency shifted non-sampled video signal. 9. The apparatus according to claim 8, further comprising: combining means for arranging a plurality of video signals obtained from said decoding means when said receiving means receives said second multiplexed coded signal; Interpolation means for selecting and interpolating one of a plurality of projection signals obtained from said decoding means; And means for selecting an output video signal of said synthesizing means or said interpolation means and supplying this selected signal to a high resolution display unit. The apparatus of claim 8, wherein the specific frequency band is the same as the frequency band of the low resolution TV signal. 9. The apparatus of claim 8, wherein the up-sampling means comprises: a first signal of horizontal and vertical low frequencies, a second signal of horizontal high and vertical low frequencies, a third signal of horizontal low and vertical high frequencies, and a fourth signal of vertical and vertical high frequencies; And said specific frequency band is said horizontal and vertical low range. 12. The apparatus of claim 11, wherein the frequency shifting means is a system for processing the second signal, the third signal, and the fourth signal. Splitting a high resolution TV signal into a plurality of frequency band signals, frequency shifting each signal in a different frequency band to a particular one of the plurality of frequency bands, down-sampling each TV signal in the particular frequency band High efficiency coding the down-sampled signal to generate a plurality of coded signals, and finally, time division multiplexing the plurality of coded signals to generate a first multiplexed coded signal, and generate a plurality of coded signals. A video signal transmission and reception method for generating a second multiplexed coded signal by performing high-efficiency coding on a low-resolution TV signal and multiplexing the time-divided plurality of coded signals, wherein the first or second multiplexed signals are transmitted. Step 1; Receiving the first or second multiplexed coded signal; A third step of generating a plurality of coded signals by separating the first multiplexed coded signal by time division when the first multiplexed coded signal is received; A fourth step of decoding the plurality of coded signals to generate a plurality of video signals; Generating a plurality of up-sampling video signals by up-sampling the plurality of video signals; A sixth step of frequency shifting the frequency shifted up-sampling video signal among the plurality of up-sampled video signals to an original frequency band; A seventh step of synthesizing the frequency shifted video signal with the up-sampled video signal without frequency shifting; An eighth step of arranging the plurality of video signals obtained in the fourth step on a screen when the second multiplexed coded signal is received; A ninth step of selecting and interpolating one of the plurality of video signals obtained in the fourth step; And a tenth step of selecting the output image signal obtained in the eighth step or the output image signal obtained in the ninth step and supplying the selected signal to the high resolution display unit. ※ Note: This is to be disclosed by the original application.