Signal transmission system

Abstract

A signal transmission system according to the present invention, in one embodiment comprises: a signal transmission unit that includes a MPEG decoder which receives digital broadcasting and outputs a luminance signal Y and two color difference signals PB/PR, and a transmission path encoding circuit which encodes the YPBPR outputted from the MPEG decoder into signals in the forms suited to a transmission path and transmits the encoded signals; and a signal reception unit that includes a transmission path decoding circuit which receives the encoded YPBPR and decodes them, a Y processing circuit which processes the decoded luminance signal Y, a chrominance processing circuit which processes the respective decoded color difference signals PB/PR, a signal conversion circuit which converts the YPBPR outputted from the Y processing circuit and the chrominance processing circuit into RGB signals, and a display device which displays the RGB signals. According to the so-configured signal transmission system, it is possible to realize a signal transmission system in which hardware configurations of the video signal transmitting end and receiving end can be simplified.

1 . A transmission apparatus for transmitting a video signal through a transmission path, comprising:
 a decoder to decode a compressively coded signal to output picture signals, including a base-band luminous signal and base-band color different signals, and a control signal which is generated based on the compressively coded signal;   an  12 C controller to control an  12 C (Inter IC control) signal; and   a CPU to control the  12 C controller and the decoder;   wherein the decoder is controlled by the CPU so as to output the picture signals which are displayable in a reception apparatus, on the basis of reception apparatus information that is received through the  12 C controller.   
   
   
       2 . A transmission apparatus for transmitting a video signal through a transmission path, comprising:
 a decoder to decode a compressively coded signal to output picture signals, including a base-band luminous signal and base-band color different signals, and a control signal which is generated based on the compressively coded signal; and   an encoder to time-divisionally multiplex the picture signals in a video period and the control signal in a retrace period, thereby to encode the picture signals and the control signal into transmission path signals suited to the transmission path.   
   
   
       3 . The transmission apparatus according to  claim 1 , wherein the control signal is information indicating at least one of (1) a picture of the picture signals is any of an I picture, a P picture, and a B picture, (2) a picture of the picture signals is either a picture picked up by progressive scanning or a picture picked up by interlaced scanning, (3) a picture of the picture signals is either a top field or a bottom field picture, (4) a compression ratio of MPEG, and (5) field repeat information of a picture of the picture signals. 
   
   
       4 . The transmission apparatus according to  claim 1 , wherein the control signal is used for controlling image quality. 
   
   
       5 . A reception apparatus for receiving a video signal through a transmission path, comprising:
 a decoder to decode transmission path signal into picture signals, including a base-band luminous signal and base-band color different signals, and a control signal, the transmission path signal is generated by coding the control signal to be used for controlling image quality, which is generated based on a compressively coded signal, and the video signal so as to be suited to the transmission path, the control signal is time-division-multiplexed in a retrace period; and   an image quality control to control the image qualities of the picture signals on the basis of the control signal.   
   
   
       6 . A transmission apparatus for transmitting a video signal through a transmission path, comprising:
 a decoder to decode a compressively coded signal to output picture signals, including a base-band luminous signal and base-band color different signals, and a control signal which is generated based on the compressively coded signal; and   an encoder to time-divisionally multiplex the picture signals in a video period and the control signal in a retrace period, thereby to encode the picture signals and the control signal into transmission path signals suited to the transmission path, wherein said transmission apparatus is adapted so that any one of a plurality of different types of display units can be connected to said transmission apparatus for receipt of said video signal transmitted by said transmission apparatus, wherein each of said plurality of different types of display units has a video input interface and a display device.   
   
   
       7 . A reception apparatus for receiving a video signal through a transmission path, comprising:
 a decoder to decode transmission path signal into picture signals, including a base-band luminous signal and base-band color different signals, and a control signal, the transmission path signal is generated by coding the control signal to be used for controlling image quality, which is generated based on a compressively coded signal, and the video signal so as to be suited to the transmission path, the control signal is time-division-multiplexed in a retrace period; and   an image quality control to control the image qualities of the picture signals on the basis of the control signal, wherein said reception apparatus is adapted so that any one of a plurality of different types of display units can be connected to said reception apparatus for receipt of said video signal transmitted by said reception apparatus, wherein each of said plurality of different types of display units has a video input interface and a display device.