US 4,384,308 A · Apparatus for recording and detecting a cue signal

In a data recording and playback apparatus wherein data is recorded in a recording medium and selectively played back, apparatus for recording and detecting a cue signal comprising:

recording means for recording a composite cue signal in the recording medium of the recording and playback apparatus, said composite cue signal including a first specified data pattern and a second specified data pattern which occurs in time after said first specified data pattern, data on said first specified data pattern being supplied and recorded before the data on said second specified data pattern;
and
detecting means for detecting a cue signal data pattern reproduced from said recording medium, said cue signal data pattern including signals corresponding to said first and second specified data patterns, said detecting means including means responsive to the detected signal corresponding to said first data pattern for compensating the contents of said second specified data pattern in accordance with the contents of said first specified data pattern to thereby produce a signal corresponding to said original recorded composite cue signal when said composite cue signal is reproduced.

In a data recording and playback apparatus wherein data is recorded in a recording medium and selectively played back, apparatus for recording and detecting a cue signal comprising:

recording means for recording a composite cue signal in the recording medium of the recording and playback apparatus, said composite cue signal including a first specified data pattern and a second specified data pattern which occurs in time after said first specified data pattern, said recording means including:
first means for supplying a signal having a first frequency as data on said first specified data pattern;
and second means for supplying a signal having a second frequency as data on said second specified data pattern;
and
detecting means for detecting a cue signal data pattern reproduced from said recording medium, said cue signal data pattern including first and second detected data corresponding respectively to said first and second specified data patterns, said detecting means including arithmetic operation means for arithmetically calculating the ratio between the first detected data corresponding to the first period of the data on said first specified data pattern and the second detected data corresponding to the second period of the data on said second specified data pattern;
means for multiplying said ratio by a value which is a function of said first detected data to produce a multiplied ratio;
and means responsive to multiplied ratio for calculating data on said cue signal pattern and compensating the contents of said second specified data pattern in accordance with said multiplied ratio and the contents of said first specified data pattern, and for thereby producing a signal corresponding to said original recorded composite cue signal when said composite cue signal is reproduced.

4 more elements

In a data recording and playback apparatus wherein data is recorded in a recording medium and selectively played back, apparatus for recording and detecting a cue signal comprising:

recording means for recording a composite cue signal in the recording medium of the recording and playback apparatus, said composite cue signal including a first specified data pattern and a second specified data pattern which occurs in time after said first specified data pattern, said recording means including:
first means for supplying a signal having a first frequency as data on said first specified data pattern;
and second means for supplying a signal having a second frequency as data on said second specified data pattern;
and
detecting means for detecting a cue signal data pattern reproduced from said recording medium, said cue signal data pattern including first and second detected data corresponding respectively to said first and second specified data patterns, said detecting means including arithmetic operation means for arithmetically calculating the ratio between the first detected data corresponding to the first period of the data on said first specified data pattern and the second detected data corresponding to the second period of the data on said second specified data pattern;
and means responsive to the calculated ratio for compensating the contents of said second specified data pattern in accordance with the contents of said first specified data pattern to thereby produce a signal corresponding to said original recorded composite cue signal when said composite cue signal is reproduced;
said detecting means further including pulse-generating means;
said first detected data corresponding to a first number of pulses issued from said pulse-generating means during a first period which is proportional to the period of the data on said first specified data pattern;
and said second detected data corresponding to a second number of pulses issued from said pulse-generating means during a second period which is proportional to the period of the data on said second specified data pattern.

6 more elements

In a data recording and playback apparatus wherein data is recorded in a recording medium and selectively played back, apparatus for recording and detecting a cue signal comprising:

recording means for recording a composite cue signal in the recording medium of the recording and playback apparatus, said composite cue signal including a first specified data pattern and a second specified data pattern which occurs in time after said first specified data pattern, said recording means including:
first means for supplying a signal having a first frequency as data on said first specified data pattern;
and second means for supplying a signal having a second frequency as data on said second specified data pattern, the data on said first specified data pattern being supplied before the data on said second specified data pattern;
and
detecting means for detecting a cue signal data pattern reproduced from said recording medium, said cue signal data pattern including first and second detected data corresponding respectively to said first and second specified data patterns, said detecting means including arithmetic operation means for arithmetically calculating the ratio between the first detected data corresponding to the first period of the data on said first specified data pattern and the second detected data corresponding to the second period of the data on said second specified data pattern;
and means responsive to the calculated ratio for compensating the contents of said second specified data pattern in accordance with the contents of said first specified data pattern to thereby produce a signal corresponding to said original recorded composite cue signal when said composite cue signal is reproduced;
said detecting means further including pulse-generating means;
said first detected data corresponding to a first number of pulses issued from said pulse-generating means during a first period which is proportional to the period of the data on said first specified data pattern;
and said second detected data corresponding to a second number of pulses issued from said pulse-generating means during a second period which is proportional to the period of the data on said second specified data pattern.

6 more elements

In a data recording and playback apparatus wherein data is recorded in a recording medium and selectively played back, apparatus for recording and detecting a cue signal comprising:

recording means for recording a composite cue signal in the recording medium of the recording and playback apparatus, said composite cue signal including a first specified data pattern and a second specified data pattern which occurs in time after said first specified data pattern, said first specified data pattern comprising at least one cycle of a signal having a first frequency, and said second specified data pattern comprising at least one cycle of a signal having a second frequency different from said first frequency, said recording means including:
first means for supplying said signal having said first frequency as data on said first specified data pattern;
and second means for supplying said signal having said second frequency as data on said second specified data pattern;
and
detecting means for detecting a cue signal data pattern reproduced from said recording medium, said cue signal data pattern including first and second detected data corresponding respectively to said first and second specified data patterns, said detecting means including arithmetic operation means for arithmetically calculating the ratio between the first detected data corresponding to the first period of the data on said first specified data pattern and the second detected data corresponding to the second period of the data on said second specified data pattern;
and means responsive to the calculated ratio of compensating the contents of said second specified data pattern in accordance with the contents of said first specified data pattern to thereby produce a signal corresponding to said original recorded composite cue signal when said composite cue signal is reproduced.

3 more elements

In a data recording and playback apparatus wherein data is recorded in a recording medium and selectively played back, apparatus for recording and detecting a cue signal comprising:

recording means for recording a composite cue signal in the recording medium of the recording and playback apparatus, said composite cue signal including a first specified data pattern and a second specified data pattern which occurs in time after said first specified data pattern;
and
detecting means for detecting a cue signal data pattern reproduced from said recording medium, said cue signal data pattern including signals corresponding to said first and second specified data patterns, said detecting means including means responsive to the detected signal corresponding to said first data pattern for compensating the contents of said second specified data pattern in accordance with the contents of said first specified data pattern to thereby produce a signal corresponding to said original recorded composite cue signal when said composite cue signal is reproduced;
said detecting means further comprising:
means (48,50) for separating said composite cue signal from audio information signals recorded on said recording medium;
a timer (52) coupled to said separating means and responsive to said composite cue signal for generating a gating signal (p) of predetermined time interval longer than the possible time interval of said composite cue signal at a given relative speed of movement of said recording medium;
gating means (54) for receiving a signal including at least a portion of the audio information signal and substantially the complete composite cue signal superposed thereon, and being responsive to the output of said timer (52) for passing substantially only a major portion of said composite cue signal during the time interval of said timer (52);
means (56,58) responsive to the output of said gating means (54) for generating a two composite digital signal, said two components each respectively being a function of said first and second specified data patterns of said composite cue signal;
and
means (60) responsive to said first component of said digital signal for determining a quantity which is a function of said first specified data pattern of said composite cue signal, and for compensating said second component of said digital signal to develop a cue signal pattern portion of said composite cue signal as a function of the determined quantity corresponding to said first specified data pattern, thereby distinguishing different cue signal data patterns from each other.

7 more elements

In a data recording and playback apparatus wherein data is recorded in a recording medium and selectively played back, apparatus for recording and detecting a cue signal comprising:

recording means for recording a composite cue signal in the recording medium of the recording and playback apparatus, said composite cue signal including a first specified data pattern and a second specified data pattern which occurs in time after said first specified data pattern;
and
detecting means for detecting a cue signal data pattern reproduced from said recording medium, said cue signal data pattern including signals corresponding to said first and second specified data patterns, said detecting means including means responsive to the detected signal corresponding to said first data pattern for compensating the contents of said second specified data pattern in accordance with the contents of said first specified data pattern to thereby produce a signal corresponding to said original recorded composite cue signal when said composite cue signal is reproduced;
said detecting means further comprising:
means (48) for separating said composite cue signal from audio information signals recorded on said recording medium;
wave-shaping means (62) coupled to said separating means for generating a wave-shaped signal corresponding to said composite cue signal, said wave-shaped signal having two components, one component corresponding to said first specified data pattern of said composite cue signal and a second component corresponding to said second specified data pattern of said composite cue signal;
means (68, 70,66) responsive to said components of said wave-shaped signal for determining a quantity which is a function of the period of said first component, said quantity being a function of said first specified data pattern of said composite cue signal, and for compensating said second component of said wave-shaped signal to develop a cue signal pattern portion of said composite cue signal as a function of the determined quantity, thereby distinguishing different cue signal data patterns from each other.

4 more elements

In a data recording and playback apparatus wherein data is recorded in a recording medium and selectively played back, apparatus for recording and detecting a cue signal comprising:

recording means for recording a composite cue signal in the recording medium of the recording and playback apparatus, said composite cue signal including a first specified data pattern and a second specified data pattern which occurs in time after said first specified data pattern;
and
detecting means for detecting a cue signal data pattern reproduced from said recording medium, said cue signal data pattern including signals corresponding to said first and second specified data patterns, said detecting means including means responsive to the detected signal corresponding to said first data pattern for compensating the contents of said second specified data pattern in accordance with the contents of said first specified data pattern to thereby produce a signal corresponding to said original recorded composite cue signal when said composite cue signal is reproduced;
said recording means comprising:
at least first through fourth timer means (14,34,16,12) for generating gate signals of predetermined time intervals;
first means (30) for supplying a first signal (f) having a first frequency (f.sub.1) corresponding to data on said first specified data pattern;
second means (36) for supplying a second signal (h) having a second frequency (f.sub.2) corresponding to data on said second specified data pattern;
a first gate (32) responsive to the gate signal of one of said timer means (14) for gating said first signal (f) for a predetermined period of time to an output terminal;
a second gate (38) responsive to the gate signal of a second said timer means (34) for gating said second signal (h) to said output terminal subsequent to the gating of said first signal to said output terminal, said first and second signals, which occur at different timing, being combined to form a composite signal at said output terminal;
a third gate (40) responsive to the gate signal from the third of said timer means (16) for gating said composite signal to a recording element (28) for recording onto said recording medium;
and
a fourth gate (20) for normally gating an audio information signal to said recording element, and for blocking said audio information signal during the time said third gate (40) gates said composite signal to said recording element, said third and fourth gates generating their gate signals at substantially the same time for substantially the same time intervals;
whereby said signals of said first and second frequencies are successively recorded onto said recording medium during a gap in the recording of said audio information signal onto said recording medium during the gating times of said third and fourth gates.

10 more elements

In a data recording and playback apparatus wherein data is recorded in a recording medium and selectively played back, apparatus for recording and detecting a cue signal comprising:

recording means for recording a composite cue signal in the recording medium of the recording and playback apparatus, said composite cue signal including a first specified data pattern and a second specified data pattern which occurs in time after said first specified data pattern;
and
detecting means for detecting a cue signal data pattern reproduced from said recording medium, said cue signal data pattern including signals corresponding to said first and second specified data patterns, said detecting means including means reponsive to the detected signal corresponding to said first data pattern for compensating the contents of said second specified data pattern in accordance with the contents of said first specified data pattern to thereby produce a signal corresponding to said original recorded composite cue signal when said composite cue signal is reproduced;
said recording means comprising:
at least first through fourth timer means (14,34,16,12) for generating gate signals of predetermined time intervals;
first means (30) for supplying a first signal (f) having a first frequency (f.sub.1) corresponding to data on said first specified data pattern;
second means (36) for supplying a second signal (h) having a second frequency (f.sub.2) corresponding to data on said second specified data pattern;
a first gate (32) responsive to the gate signal of one of said timer means (14) for gating said first signal (f) for a predetermined period of time to an output terminal;
a second gate (38) responsive to the gate signal of a second said timer means (34) for gating said second signal (h) to said output terminal subsequent to the gating of said first signal to said output terminal, said first and second signals, which occur at different timing, being combined to form a composite signal at said output terminal;
a third gate (40) responsive to the gate signal from the third of said timer means (16) for gating said composite signal to a recording element (28) for recording onto said recording medium;
and
means (22,24,26) for coupling an audio information signal to said recording element for recording on said recording medium;
whereby said signals of said first and second frequencies are successively recorded onto said recording medium, and said audio information signal is recorded on said recording medium.

10 more elements

Apparatus for recording and detecting a cue signal

Life of this patent

Apparatus for recording and detecting a cue signal

Life of this patent

Abstract

Claims29