KR970029462A - Special video tapes and their recording / playback apparatus for preventing playback - Google Patents

Abstract

The present invention relates to a specific video tape and a recording / reproducing apparatus of the video tape for preventing reproduction, the configuration of which records an audio / video signal on the video tape or records an audio / video signal recorded on the video tape. In a video cassette recorder for reading and outputting video and audio, a video signal (I) is provided in an audio head (22b) and a deep layer of a magnetic layer (3) so that an audio signal (23b) is recorded on a surface layer of a magnetic layer (3) of a video tape T. A signal recording / reading means 22 having a video head 22b for recording 2a) and capable of reading audio / video signals of the video tape T recorded in this way; and the signal recording / reading means. A reproduction signal processing means 32 for reproducing and processing the audio / video signal read out at 22 into a signal for outputting through the audio / video output means 42 and 44, and inputted from the outside; The audio / video signal is applied so that the audio signal 23b is recorded in the magnetic layer 3 surface layer portion of the video tape T, and the video signal 23a is recorded in the deep portion of the magnetic layer 3. 26), it is very useful for recording / reproducing use of contents requiring specific date keeping.

Description

Special video tapes and their recording / playback apparatus for preventing playback

As this is a public information case, the full text was not included.

2 is a block diagram of a recording / reproducing apparatus for a specific video tape for preventing reproduction according to the present invention.

Figure 3 (a) is a view illustrating a rotating drum structure of the signal recording / reading unit according to the present invention.

3 (b) is a cross-sectional view showing the structure of a specific video tape for preventing reproduction according to the present invention.

Claims (5)

A video cassette recorder for recording an audio / video signal on a video tape or for reading out an audio / video signal recorded on the video tape and outputting a video / audio signal, wherein the magnetic layer (3) of the video tape (T) is placed on the surface layer. An audio head 22b for recording the audio signal 23b and a video head 22b for recording the video signal 23a in the deep portion of the magnetic layer 3 are provided. A signal recording / reading means 22 capable of reading a video signal, and an audio / video signal read out from the signal recording / reading means 22 for outputting through the audio / video output means 42,44. The audio signal 23b is to be recorded in the surface layer portion of the magnetic layer 3 of the video tape T by receiving the reproduction signal processing means 32 for reproducing the signal and the audio / video signal input from the outside. Layer 3 simcheungbu the video signal (2a) is recorded so that the signal processing is a particular video tape recording / reproducing apparatus for reproduction protection, characterized in that configured to include a recording signal processing means (26). 2. The encryption code detecting means (4) according to claim 1, further comprising: encryption code recording means (46) for recording an encryption code on said video tape (T), and encryption code detection means for detecting an encryption code recorded on said video tape (T). 48. An apparatus for recording / playback of a specific video tape, by which playback is prevented, which is further configured. The encryption code detection unit (48) according to claim 1, further comprising: outputting an OSD control signal (B) during playback of the video tape (T) to display an on-screen display for inputting an encryption code on the television's CRT, and then detecting it by the encryption code detection unit (48). When the encryption code is compared with the encryption code inputted from the control signal input unit 10, the reproduction operation is performed only when it is determined to be the same, and during recording, the control signal is applied to the encryption code recording unit 46 to control the reproduction. Recording / reproducing a specific video tape for preventing reproduction, further comprising a control means 12 for controlling to record the encryption code input through the signal input section 10 on the video tape T. Device. 2. The recording signal processing means (26) according to claim 1, characterized in that the recording signal processing means (26) processes the video signal to be magnetized to the deeper magnetic layer of the video tape by setting the frequency lower than the carrier of the audio signal. Apparatus for recording / playback of specific video tapes to prevent playback. In a video tape in which an audio signal and a video signal are superimposed and recorded in the thickness direction of the video tape, the video signal 23a is magnetized and recorded to the deep portion of the magnetic layer 3 of the video tape T, and the audio signal 23b is A specific video tape for reproduction prevention, characterized in that the video signal (23a) is recorded on the surface layer of the magnetic layer (3) in which the video signal (23a) is superimposed with the video signal (23a). ※ Note: The disclosure is based on the initial application.