Method and apparatus for recording/reproducing signals on magnetic tape

A magnetic tape comprising:

• a recording track, on which an input signal containing program data and program-linked information associated with the program data is recorded;
• and
• a control track, on which both a control signal of a frequency within a predetermined range corresponding to a running speed of the magnetic tape and a modulated program-linked signal are recorded;
• wherein the modulated program-linked signal is obtained by extracting a program-linked signal containing the program-linked information from the input signal and modulating the program-linked signal so as to have a frequency different from any frequency within a predetermined possible range of the control signal.

A method for reproducing signals recorded on a magnetic tape,

• the magnetic tape comprising a recording track, on which an input signal containing program data and program-linked information associated with the program data is recorded, and a control track, on which both a control signal of a frequency within a predetermined range corresponding to a running speed of the magnetic tape and a modulated program-linked signal are recorded, wherein the modulated program-linked signal is obtained by extracting a program-linked signal containing the program-linked information from the input signal and modulating the program-linked signal so as to have a frequency different from any frequency within a predetermined possible range of the control signal;
• the method comprising:
• reading a compound signal including the control signal and the modulated program-linked signal from the control track of the magnetic tape;
• separating the modulated program-linked signal from the control signal;
• and
• outputting a video signal based on the separated modulated program-linked signal.

A method for recording and reproducing signals on a magnetic tape, comprising, during a record mode,

• receiving an input signal containing program data and program-linked information associated with the program data;
• extracting a program-linked signal containing the program-linked information from the input signal;
• modulating the program-linked signal so as to have a frequency different from any frequency within a predetermined possible range of a control signal, a frequency of the control signal being within a predetermined range corresponding to a running speed of the magnetic tape;
• recording the input signal on a recording track of the magnetic tape;
• and
• recording the control signal and the modulated program-linked signal on a control track of the magnetic tape;
• and
• the method further comprising, during a playback mode,
• reading a compound signal including the control signal and the modulated program-linked signal from the control track of the magnetic tape;
• separating the modulated program-linked signal from the control signal;
• and
• outputting a video signal based on the separated modulated program-linked signal.

An apparatus for recording signals on a magnetic tape, comprising:

• a record head which records an input signal containing program data and program-linked information associated with the program data on a recording track of the magnetic tape;
• a program information extractor which extracts a program-linked signal containing the program-linked information from the input signal;
• a modulator which modulates the program-linked signal so as to have a frequency different from any frequency within a predetermined possible range of a control signal, a frequency of the control signal being within a predetermined range corresponding to a running speed of the magnetic tape;
• and
• a control head which records the control signal and the modulated program-linked signal on a control track of the magnetic tape.

An apparatus for reproducing signals recorded on a magnetic tape,

• the magnetic tape comprising a recording track, on which an input signal containing program data and program-linked information associated with the program data is recorded, and a control track, on which both a control signal of a frequency within a predetermined range corresponding to a running speed of the magnetic tape and a modulated program-linked signal are recorded, wherein the modulated program-linked signal is obtained by extracting a program-linked signal containing the program-linked information from the input signal and modulating the program-linked signal so as to have a frequency different from any frequency within a predetermined possible range of the control signal;
• the apparatus comprising:
• a reproduce head which reads the input signal recorded on the recording track of the magnetic tape;
• a control head which reads a compound signal including the control signal and the modulated program-linked signal from the control track of the magnetic tape;
• a circuit which separates the modulated program-linked signal from the control signal;
• and
• a signal output section which outputs a video signal based on the separated modulated program-linked signal.

An apparatus for recording and reproducing signals on a magnetic tape, comprising:

• a record/reproduce head which records an input signal containing program data and program-linked information associated with the program data on a recording track of the magnetic tape and which reads the input signal recorded on the recording track of the magnetic tape;
• a program information extractor which extracts a program-linked signal containing the program-linked information from the input signal;
• a modulator which modulates the program-linked signal so as to have a frequency different from any frequency within a predetermined possible range of a control signal, a frequency of the control signal being within a predetermined range corresponding to a running speed of the magnetic tape;
• a control head which records the control signal and the modulated program-linked signal on the control track of the magnetic tape and which reads a compound signal including the control signal and the modulated program-linked signal from the control track of the magnetic tape;
• a circuit which separates the modulated program-linked signal from the control signal;
• and
• a signal output section which outputs a video signal based on the separated modulated program-linked signal.