 High definition television receiver enabling picture-in picture display |
| To accomplish the above objects, in accordance with the present invention there is provided a ... |
|
| Apparatus for receiving wide/standard picture plane television signal |
| A first object of the present invention is to provide a wide picture plane/standard picture plane ... |
|
| Wide screen television |
| What is claimed is: 1. A display system, comprising: display means having a first format display ... |
|
| Three-LCD projector having specified scanning directions |
| An object of the present invention is to provide a projection type liquid crystal color display ... |
|
| Method and apparatus for recording and reproducing a video-disc with an oscillated track |
| An object of this invention is to provide a method and apparatus for recording and reproducing ... |
|
| Color image enlarging ink jet printer |
| In order to achieve the above object an automatic printing device according to this invention is ... |
|
| Copy timing control circuit for double-deck video cassette recorder |
| The present invention generally aims to provide a copy timing control circuit capable of ... |
|
|
Digital transmission signal processing system and recording/reproducing system
| Details |
Inventors: Arai, Hideo; Owashi, Hitoaki; Hosokawa, Kyoichi; Nishimura, Keizo; Watatani, Yoshizumi; Shibata, Akira;
Assignee: Hitachi, Ltd. (Tokyo, JP)
Primary Examiner: Epps; Georgia Y.
Assistant Examiner: Dinh; Tan
Attorney, Agent or Firm: Antonelli, Terry, Stout & Kraus
A processing system and a recording/reproducing system for a digital signal including a digital video signal and a digital audio signal are disclosed. Upon transmission, the digital signal is transmitted after time-base compression and modulation. The transmitted signal is received and demodulated. In the case where the signal is to be transmitted to a plurality of recording/reproducing systems, address signals designating ones of the plural recording/reproducing systems and a control signal for controlling the start/stop of recording are transmitted. The recording by the recording/reproducing system is controlled so that it is made with the same format in either normal-speed or high-speed mode or in either normal or multiple recording mode. |
|
DETAILED DESCRIPTION An object of the present invention is to provide a digital VTR in which high-speed recording onto a tape can be made with the same format as that used in standard-speed recording, to provide a transmission signal processing system for transmitting at a high speed a video signal to be recorded by such a digital VTR, and to extend the range of use of the digital VTR by shortening a recording time.
For example, the digital VTR can be used in such a manner that a two-hour program is recorded in about ten minutes and is reproduced at a standard speed.
The above object is achieved as follows.
A video signal and an audio signal are subjected to time-base compression to 1/m, bit compression to 1/n, addition of a parity signal and modulation, and are thereafter transmitted or outputted.
The transmitted signal is received, is subjected to demodulation, error correction, addition of a parity signal and modulation, and is thereafter recorded, onto a magnetic tape which travels at a travel speed m times as high as that upon normal reproduction, by use of a magnetic head on a cylinder which rotates at a frequency m times as high as that upon normal reproduction.
The signal on the magnetic tape traveling at a travel speed upon normal reproduction is reproduced by a magnetic head on the cylinder which rotates at a frequency upon normal reproduction.
The reproduced signal is subjected to demodulation, error correction, bit expansion of video and audio signals and D/A conversion, and is thereafter outputted.
Address signals corresponding to a plurality of VTR's may be transmitted prior to a signal to be recorded.
Further, control signals indicative of the start of recording and the stop of recording may be transmitted.
The transmitted signals are received and error-corrected, and controls of the standby for recording, the start of recording and the stop of recording are made on the basis of the control signals.
With the above construction, since the video signal and the audio signal are time-base compressed to 1/m and bit-compressed to 1/n, a transmission time is shortened to 1/m and a signal band turns to m/n
|
|
TV Signal 
