Signal compensation system in recording and reproducing apparatus

Claim 3

The system of claim 1 and first switching means for taking out the signals reproduced from one of said channels in one of said areas during a predetermined period, means responsive to a loss of said signal for generating a switching pulse having a width equal to the duration of the loss of signal, second switching means for taking out the signals reproduced from another of said channels in another of said areas, said loss responsive means comprising means responsive to said switching pulse for operating said switching means to substitute the signal from said other channel for the signal from said one chAnnel, and output circuit means for accepting both the signal from said one channel and the substituted signal from the other channel, thereby providing a single signal having compensation for said loss of signal.

Claim 4

A signal compensation system in a recording and reproducing apparatus, said system comprising means for respectively and simultaneously reproducing signals recorded in each of a plurality of channels, said channels having periodic and interrelated information signals recorded therein, first switching means for alternately taking out during a predetermined period the signals of the plurality of channels as said signals are reproduced by the reproducing means, means for generating a switching pulse having a pulse width corresponding to an interval while there is a loss of signal strength, second switching means operated responsive to the switching pulse and only during an interval corresponding to the width of said switching pulse for taking out other signal from a channel other than the channel taken out by the first switching means, and output means for selectively accepting the signals passed through said first and second switching means for obtaining an integrated output signal, said output signal having the other signal substituted for the lost signal.

Claim 5

A signal compensation system in a recording and reproducing apparatus, said system comprising means for respectively and simultaneously reproducing signals recorded in each of a plurality of channels, said channels having periodic and interrelated information signals recorded therein, first switching means for alternately taking out during a predetermined period the signals of the plurality of channels as said signals are reproduced by the reproducing means, means for generating a switching pulse having a pulse width corresponding to an interval while there is a loss of signal strength, second switching means operated responsive to the switching pulse and only during an interval corresponding to the width of said switching pulse for taking out other signal from a channel other than the channel taken out by the first switching means, and output means for selectively accepting the signals passed through said first and second switching means for obtaining an integrated output signal, said output signal having the other signal substituted for the lost signal.

Claim 6

The system of claim 3 in which said recording and reproducing apparatus comprises a rotary recorded medium, a plurality of recording and reproducing heads, means for alternately and intermittently stepping said heads across said medium, and means for rotating said medium in synchronism with a period recurring in the recording signal, said plurality of heads recording and reproducing the signals of respectively corresponding channels on and from said medium.

Claim 7

A signal compensation system in a recording and reproducing apparatus, said system comprising means for respectively and simultaneously reproducing signals of two channels, first switching means for alternately taking out signals of every field from the signals of the two channels reproduced by the reproducing means, means for generating a switching pulse having a pulse width corresponding to an interval during which the signal of the channel taken out by the first switching means has a level below a predetermined level, delay means for delaying the signals of the two channels reproduced by the reproducing means for a period equal to H/2, second switching means for selectively passing either the signal of the channel taken out by the first switching means or the output signal of the delay means, said second switching means being normally operated to pass the signal taken out by the first switching means during an interval corresponding to the width of the switching pulse, and output means for taking out the signal passed through said first and second switching means, said output signal taken from said output means being a compensated signal comprising a substitution of a signal in the corresponding part of the other channel for the signal below said predetermined level.

Claim 8

A signal compensation system in a recording and reproducing apparatus, said system comprising means for respectively and simultaneously reproducing signals of two channels, first switching means for alternately taking out signals of every field from the signals of the two channels reproduced by the reproducing means, means for generating a switching pulse having a pulse width corresponding to an interval during which the signal of the channel taken out by the first switching means has a level below a predetermined level, delay means for delaying the signals of the two channels reproduced by the reproducing means for a period equal to H/2, second switching means for selectively passing either the signal of the channel taken out by the first switching means or the output signal of the delay means, said second switching means being normally operated to pass the signal taken out by the first switching means during an interval corresponding to the width of the switching pulse, and output means for taking out the signal passed through said first and second switching means, said output signal taken from said output means being a compensated signal comprising a substitution of a signal in the corresponding part of the other channel for the signal below said predetermined level.

Claim 9

The system of claim 5 and means for short-circuiting said delay means responsive to signals reproduced by the reproducing means when said signals comprise field signals of either an even number or an odd number recorded by a field skip recording apparatus, whereby said signal is by-passed around said delay means via said short-circuit.

Claim 10

The system of claim 5 in which said switching pulse generating means and said delay means are respectively provided in transmission paths over which signals from the two channels are transmitted from the signal reproducing means to the first switching means, means whereby said generating means generates the switching pulse when the signal strength in the channel taken out by the first switching means falls below said predetermined level, and said first switching means is supplied with an output of the second switching means.

Claim 11

The system of claim 5 which further comprises third switching means for taking out a field signal for every alternate field which is not taken out by the first switching means from the signals of the two channels reproduced by the reproducing means, said delay means being connected to the output side of the third switching means, said switching pulse generating means being connected to the output side of the first switching means, and said second switching means being connected to the output sides of the second and third switching means.

Claim 12

The system of claim 8 in which said reproduced signal is a modulated signal, and which further comprises limiter means for limiting and amplifying the output of the second switching means, and demodulating means for demodulating the reproduced modulated signal.

Claim 13

The system of claim 8 in which said reproduced signal is a modulated signal, and which further comprises limiter means for limiting, amplifying, and demodulating said modulated signal, said limiter being connected from a point between the delay means and the second switching means to a point between the first switching means the the second switching means.