Information recording and reproduction apparatus to be controlled by temporal information

An information recording and reproduction apparatus comprising:

• means for recording a first information signal providing a main information signal supplied through a transmission line, and a second information signal attached to the first information signal and representing a reproduction deadline of the first information signal;
• means for reproducing the first information signal and the second information signal;
• means for detecting a third information signal supplied through said transmission line at the time of reproduction providing temporal information including date and time;
• means for comparing the second information signal reproduced by said reproducing means with the third information signal detected by said detecting means;
• and
• means for cutting off the output of the reproduced first information signal in accordance with a comparison result produced from said comparing means;
• wherein in the case where the temporal information providing the third information signal has passed the reproduction deadline provided by the second information signal, said signal cutting-off means cuts off the reproduced output of said first information signal.

An information recording and reproduction apparatus comprising:

• means for recording a first information signal providing a main information signal supplied through a transmission line, a second information signal attached to a first information signal and representing a valid reproducible period of the first information signal and a third information signal providing temporal information including date and time;
• means for reproducing the first information signal, the second information signal and the third information signal;
• means for detecting a fourth information signal supplied through the transmission line at the time of reproduction providing temporal information including the date and time;
• arithmetic means for calculating a reproduction deadline from the second information signal and the third information signal reproduced by said reproducing means;
• means for comparing the reproduction deadline information calculated by said arithmetic means and the fourth information signal detected by said detecting means;
• and
• means for cutting off the output of the reproduced first information signal in accordance with a comparison result produced from said comparing means;
• wherein in the case where the temporal information provided by the fourth information signal has passed the reproduction deadline calculated by said arithmetic means, said signal cutting-off means cuts off the output of said reproduced first information signal.

An information recording and reproduction apparatus comprising:

• means for recording a first information signal providing a main information signal supplied through a transmission line and a second information signal attached to said first information and representing a reproduction deadline of the first information signal;
• means for reproducing the first information signal and the second information signal;
• means for generating a third information signal providing temporal information including date and time;
• means for comparing the reproduced second information signal with the third information signal generated by said temporal information generating means;
• and
• means for cutting off the output of said reproduced first information signal in accordance with a comparison result produced from said comparing means;
• wherein in the case where the temporal information provided by said third information signal has passed the reproduction deadline, said signal cutting-off means cuts off the output of said reproduced first information signal.

An information recording and reproduction apparatus for recording a temporally-compressed digital information signal supplied through a transmission line and reproducing said digital information signal at a tape speed different from that for recording so that a transmission rate of the digital information signal for reproduction is different from that for recording;

• wherein a recording system of said apparatus includes means for adding a first error detection-correction code to each predetermined unit of an input digital signal supplied through the transmission line, means for dividing the digital signal with said error detection-correction code added thereto into predetermined blocks and adding an address signal to said digital signal, means for adding a second error detection-correction code to the digital signal with the address signal added thereto, modulation means for converting said digital signal into a predetermined signal form, means for recording said predetermined signal form on a magnetic tape, and means for driving the magnetic tape at a first speed;
• wherein a reproduction system of said apparatus includes means for driving the magnetic tape at a second speed corresponding to a temporal compression ratio of the input digital signal, means for detecting a modulated reproduction signal from said magnetic tape, demodulation means for restoring the modulated reproduction signal into an original digital signal form, error detection means for extracting a correct reproduction digital signal by the second error detection-correction code, means for detecting an address signal, memory means for writing the correct reproduction digital signal into a predetermined area in the memory means in accordance with the address signal, means for detecting another reproduction digital signal from the second following track counted from the track with the reproduction digital signal recorded therein, means for correcting an error of each predetermined unit of said reproduction digital signal written in said memory means using the first error detection-correction code, and temporal expansion means for reading out an error-corrected reproduction digital signal at a predetermined transmission rate;
• wherein the updating of the digital signal in said memory means is stopped and the error correction of each predetermined unit of said reproduction digital signal is started by said error correcting means in accordance with the detection signal produced from said signal detecting means.

An information recording and reproduction apparatus for recording a temporally-compressed digital information signal supplied through a transmission line and reproducing the digital information signal at a tape speed different from that for recording so that a transmission rate of the digital information for reproduction is different from that for recording;

• wherein a recording system of said apparatus includes means for adding a first error detection-correction code to each predetermined unit of the input digital signal supplied through the transmission line, means for dividing the digital signal with the first error detection-correction code added thereto into predetermined blocks and adding an address signal to said digital signal, means for adding a second error detection-correction code to said digital signal with an address signal added thereto, modulation means for converting the recording digital signal into a predetermined signal form, means for recording the predetermined signal form on a magnetic tape, and means for driving the magnetic tape at a first speed;
• wherein a reproduction system of said apparatus includes means for driving the magnetic tape at a second speed corresponding to the temporal compression ratio of the input digital signal, means for detecting the modulated reproduction signal from the magnetic tape, demodulation means for restoring the modulated reproduction signal to an original digital signal form, error detection means for extracting a correct reproduction digital signal by using the second error detection-correction code, means for detecting an address signal, memory means for writing the correct reproduction digital signal in a predetermined area in the memory means in accordance with an address signal, means for detecting the data amount of the reproduction digital signal stored in the memory means, means for correcting an error of each predetermined unit of the reproduction digital signal stored in the memory means using the first error detection-correction code, and temporal expansion means for reading out the error-corrected reproduction digital signal at a predetermined transmission rate;
• wherein the second magnetic tape speed for the tape drive means of the reproduction system is controlled in accordance with the data amount detected by said data amount detecting means.