System for recording and reproducing picture signals with amplitude reference signals

Claim 1

A recording medium comprising frames in which two kinds of amplitude modulated video signals are alternately recorded in the horizontal scanning direction of a raster as variations in the optical density of the medium without overlapping in the recording densities of the respective recording portions and at least one standard signal indicative of the signal intensity where the two kinds of signals are separated and/or the fixed bias levels of the two kinds of signals are recorded at the initial and/or terminal part of the horizontal scanning lines in the raster.

Claim 7

An apparatus for alternately recording two kinds of amplitude modulated video signals in a raster on a recording medium sensitive to an energy beam, comprising: a. a recorder for exposing the recording medium to a scanned energy beam in a raster including means for modulating the d.c. beam intensity in response to a modulation signal, b. means for adding different fixed bias signals to the respective center levels of the two kinds of amplitude modulated video signals such that the composite signals do not have overlapping intensities, c. a switching circuit for alternately sampling said two kinds of signals having nonoverlapping intensities at a frequency higher than the horizontal scanning frequency of a raster to produce a modulation signal, d. means for producing at least one signal indicative of a preselected standard signal intensity into the modulation signal during the period corresponding to the initial and/or the terminal part of each horizoNtal scan, and e. a means for supplying the composite modulation signal to be recorded to the aforesaid energy beam recorder.

Claim 8

An apparatus for alternately recording two kinds of amplitude modulated video signals in a raster on a recording medium sensitive to an energy beam, comprising: a. a recorder for exposing the recording medium to a scanned energy beam in a raster including means for modulating the d.c. beam intensity in response to a modulation signal, b. means for adding different fixed bias signals to the respective center levels of the two kinds of amplitude modulated video signals such that the composite signals do not have overlapping intensities, c. a switching circuit for alternately sampling said two kinds of signals having nonoverlapping intensities at a frequency higher than the horizontal scanning frequency of a raster to produce a modulation signal, d. means for producing at least one signal indicative of a preselected standard signal intensity into the modulation signal during the period corresponding to the initial and/or the terminal part of each horizoNtal scan, and e. a means for supplying the composite modulation signal to be recorded to the aforesaid energy beam recorder.

Claim 14

An apparatus for reproducing two kinds of amplitude modulated video signals from a recording medium comprising frames in which the two kinds of video signals are alternately recorded in the horizontal scanning direction of a raster as variations in optical density of the medium without overlap of the recording density ranges of the alternately recorded portions and at least one signal indicative of a preselected standard intensity recorded at the initial and/or terminal parts of the horizontal scan comprising: a. means for driving said recording medium, b. means for scanning said recording medium and recovering a signal recorded on said medium, c. means for extracting the standard intensity signal from the recovered signal and converting it into a separation signal indicative of the signal intensity where the two kinds of video signals do not overlap, d. means for separating the recovered signal referred to in (b) at said separation signal intensity, and e. envelope detectors for respectively detecting the two kinds of amplitude modulated video signals from the signals separated by the separating means (d).

Claim 15

An apparatus for reproducing two kinds of amplitude modulated video signals from a recording medium comprising frames in which the two kinds of video signals are alternately recorded in the horizontal scanning direction of a raster as variations in optical density of the medium without overlap of the recording density ranges of the alternately recorded portions and at least one signal indicative of a preselected standard intensity recorded at the initial and/or terminal parts of the horizontal scan comprising: a. means for driving said recording medium, b. means for scanning said recording medium and recovering a signal recorded on said medium, c. means for extracting the standard intensity signal from the recovered signal and converting it into a separation signal indicative of the signal intensity where the two kinds of video signals do not overlap, d. means for separating the recovered signal referred to in (b) at said separation signal intensity, and e. envelope detectors for respectively detecting the two kinds of amplitude modulated video signals from the signals separated by the separating means (d).

Claim 17

An apparatus for reproducing two kinds of amplitude modulated video signals from a recording medium comprising frames in which the two kinds of video signals are alternately recorded in the horizontal scanning direction of a raster as variations in optical density of the medium without overlap of the recording density ranges of the alternately recorded portions and a separation signal at the initial and/or terminal parts of the horizontal scan indicative of signal intensity where the two kinds of video signals do not overlap comprising: a. means for driving said recording medium, b. means for scanning said recording medium and recovering the signals recorded on said medium, c. means for clamping the separation level of the recovered signal by using part of the separation signal, d. means for separating the output of said clamping means (c) at the clamping level voltage, and e. envelope detectors for respectively detecting the two kinds of video signals from said separated signals.

Claim 18

An apparatus for reproducing two kinds of amplitude modulated video signals from a recording medium comprising frames in which the two kinds of video signals are alternately recorded in the horizontal scanning direction of a raster as variations in optical density of the medium without overlap of the recording density ranges of the alternately recorded portions and a separation signal at the initial and/or terminal parts of the horizontal scan indicative of signal intensity where the two kinds of video signals do not overlap comprising: a. means for driving said recording medium, b. means for scanning said recording medium and recovering the signals recorded on said medium, c. means for clamping the separation level of the recovered signal by using part of the separation signal, d. means for separating the output of said clamping means (c) at the clamping level voltage, and e. envelope detectors for respectively detecting the two kinds of video signals from said separated signals.

Claim 19

An apparatus for reproducing two kinds of amplitude modulated video signals from a recording Medium comprising frames in which the two kinds of video signals are alternately recorded in the horizontal scanning direction of a raster as variations in optical density of the medium without overlap of the recorded density ranges of the alternately recorded portions and at the initial and/or terminal parts of the horizontal scanning a standard signal indicative of the center level of the two video signals comprising: a. means for driving said recording medium, b. means for scanning said recording medium and recovering a signal recorded on said medium, c. means for extracting the respective center level signals from the recovered signal and converting them into a separation level voltage, d. means for separating the recovered signal referred to in (b) at said separation level voltage, and e. envelope detectors for respectively detecting the two kinds of video signals from the signals separated by the separating means referred to in (d).

Claim 20

An apparatus for reproducing two kinds of amplitude modulated video signals from a recording Medium comprising frames in which the two kinds of video signals are alternately recorded in the horizontal scanning direction of a raster as variations in optical density of the medium without overlap of the recorded density ranges of the alternately recorded portions and at the initial and/or terminal parts of the horizontal scanning a standard signal indicative of the center level of the two video signals comprising: a. means for driving said recording medium, b. means for scanning said recording medium and recovering a signal recorded on said medium, c. means for extracting the respective center level signals from the recovered signal and converting them into a separation level voltage, d. means for separating the recovered signal referred to in (b) at said separation level voltage, and e. envelope detectors for respectively detecting the two kinds of video signals from the signals separated by the separating means referred to in (d).

Claim 23

An apparatus for reproducing two kinds of amplitude modulated video signals from a recording medium comprising frames in which the two kinds of video signals are alternately recorded in the horizontal scanning direction of a raster as variations in optical density of the medium without overlap of the recording density ranges of the alternately recorded portions and a separation signal indicative of a signal intensity where the two alternately recorded video signals do not overlap and the respective center level signals of the two kinds of video signals are recorded comprising: a. means for driving said recording medium, b. means for scanning said recording medium and recovering a signal recorded on said medium, c. means for clamping the separation level of the said recovered signal by using the separation intensity signal, d. means for separating the output of said clamping means (c) at the clamping level voltage, e. envelope detectors for respectively detecting the video signals from said separated signals, and f. means for respectively clamping part of the respective center level signals included in the two kinds of video signals detected by the envelope detectors (e).

Claim 24

An apparatus for reproducing two kinds of amplitude modulated video signals from a recording medium comprising frames in which the two kinds of video signals are alternately recorded in the horizontal scanning direction of a raster as variations in optical density of the medium without overlap of the recording density ranges of the alternately recorded portions and a separation signal indicative of a signal intensity where the two alternately recorded video signals do not overlap and the respective center level signals of the two kinds of video signals are recorded comprising: a. means for driving said recording medium, b. means for scanning said recording medium and recovering a signal recorded on said medium, c. means for clamping the separation level of the said recovered signal by using the separation intensity signal, d. means for separating the output of said clamping means (c) at the clamping level voltage, e. envelope detectors for respectively detecting the video signals from said separated signals, and f. means for respectively clamping part of the respective center level signals included in the two kinds of video signals detected by the envelope detectors (e).

Claim 25

A system for recording and reproducing at least two types of simultaneously produced corresponding amplitude modulation information signals, said signals being produced for arrangement of information in sequential frames, each frame comprising a scanning raster, each raster in turn comprising a plurality of scan lines, each scan line comprising information signals between blanking or retrace signals, said system including: A. recording means comprising: a. means for adding different fixed bias signals to the center levels of each type of information signal to provide adjusted center levels such that the signal intensities do not overlap, b. means for producing at least one standard level signal indicative of the adjusted center levels of said information signals, said standard level signal being produced during the initial and/or terminal part of each scan line, c. means for alternately sampling said types of information signals at a frequency higher than the scanning frequency, d. means comprising a scanned energy beam for recording the composite sampled signals and said at least one standard level signal in monochrome on a raster on a recording medium, B. reproducing means comprising: a. means for scanning each raster on the recording means and recovering the sAid composite signal therefrom, b. means utilizing the non-overlap in sampled signal levels and at least one standard signal for separating the types of sampled signals, and c. means comprising envelope detectors for detecting and producing continuous signals from the types of sampled signals.

Claim 26

A system for recording and reproducing at least two types of simultaneously produced corresponding amplitude modulation information signals, said signals being produced for arrangement of information in sequential frames, each frame comprising a scanning raster, each raster in turn comprising a plurality of scan lines, each scan line comprising information signals between blanking or retrace signals, said system including: A. recording means comprising: a. means for adding different fixed bias signals to the center levels of each type of information signal to provide adjusted center levels such that the signal intensities do not overlap, b. means for producing at least one standard level signal indicative of the adjusted center levels of said information signals, said standard level signal being produced during the initial and/or terminal part of each scan line, c. means for alternately sampling said types of information signals at a frequency higher than the scanning frequency, d. means comprising a scanned energy beam for recording the composite sampled signals and said at least one standard level signal in monochrome on a raster on a recording medium, B. reproducing means comprising: a. means for scanning each raster on the recording means and recovering the sAid composite signal therefrom, b. means utilizing the non-overlap in sampled signal levels and at least one standard signal for separating the types of sampled signals, and c. means comprising envelope detectors for detecting and producing continuous signals from the types of sampled signals.

Claim 27

A system for recording and reproducing two types of simultaneously produced corresponding amplitude modulation information signals, said signals being produced for arrangement of information in sequential frames, each frame comprising a scanning raster, each raster in turn comprising a plurality of scan lines, each scan line comprising information signals between blanking or retrace signals, said system including: A. recording means comprising: a. means for adding different fixed bias signals to the center levels of each type of information signal to provide adjusted center levels such that the signal intensities do not overlap, b. means for producing standard level signals comprising signals corresponding to each of said adjusted center levels and a separation level signal indicative of a reference between said adjusted center levels, said standard level signals being produced during the initial and/or terminal part of each scan line, c. means for alternately sampling said two types of information signals at a frequency higher than the scanning frequency, d. means comprising a scanned energy beam for recording the composite sampled information and center level signals and said separation level signal in monochrome on a raster on a recording medium, B. reproducing means comprising: a. means for scanning each raster on the recording means and recovering the said composite signal therefrom, b. means utilizing the non-overlap in sampled signal levels and the standard signals for separating the two types of sampled signals, and c. means comprising envelope detectors for detecting and producing two continuous signals from the two types of sampled signals.

Claim 28

A system for recording and reproducing two types of simultaneously produced corresponding amplitude modulation information signals, said signals being produced for arrangement of information in sequential frames, each frame comprising a scanning raster, each raster in turn comprising a plurality of scan lines, each scan line comprising information signals between blanking or retrace signals, said system including: A. recording means comprising: a. means for adding different fixed bias signals to the center levels of each type of information signal to provide adjusted center levels such that the signal intensities do not overlap, b. means for producing standard level signals comprising signals corresponding to each of said adjusted center levels and a separation level signal indicative of a reference between said adjusted center levels, said standard level signals being produced during the initial and/or terminal part of each scan line, c. means for alternately sampling said two types of information signals at a frequency higher than the scanning frequency, d. means comprising a scanned energy beam for recording the composite sampled information and center level signals and said separation level signal in monochrome on a raster on a recording medium, B. reproducing means comprising: a. means for scanning each raster on the recording means and recovering the said composite signal therefrom, b. means utilizing the non-overlap in sampled signal levels and the standard signals for separating the two types of sampled signals, and c. means comprising envelope detectors for detecting and producing two continuous signals from the two types of sampled signals.

Claim 31

A system for recording and reproducing two types of simultaneously produced corresponding amplitude modulation information signals, said signals being produced for arrangement of information in sequential frames, each frame comprising a scanning raster, each raster in turn comprising a plurality of scan lines, each scan line comprising information signals between blanking or retrace signals, said system including: A. recording means comprising: a. means for adding different fixed bias signals to the center levels of each type of information signal to provide adjusted center levels such that the signal intensities do not overlap, b. means for producing a standard level signal being a separation level signal indicative of a reference between the adjusted center levels of said sampled signals, said separation level being produced during the initial and/or terminal part of each scan line, c. means for alternately sampling said two types of signals at a frequency higher than the scanning frequency, d. means comprising a scanned energy beam for recording the composite sampled signals and said separation level signal in monochrome on a raster on a recording medium, B. reproducing means comprising: a. means for scanning each raster on the recording means and recovering the said composite signal therefrom, b. means utilizing the non-overlap in sampled signal levels and separation level signal for separating the two types of sampled signals, and c. means comprising envelope detectors for detecting And producing two continuous signals from the two types of sampled signals.

Claim 32

A system for recording and reproducing two types of simultaneously produced corresponding amplitude modulation information signals, said signals being produced for arrangement of information in sequential frames, each frame comprising a scanning raster, each raster in turn comprising a plurality of scan lines, each scan line comprising information signals between blanking or retrace signals, said system including: A. recording means comprising: a. means for adding different fixed bias signals to the center levels of each type of information signal to provide adjusted center levels such that the signal intensities do not overlap, b. means for producing a standard level signal being a separation level signal indicative of a reference between the adjusted center levels of said sampled signals, said separation level being produced during the initial and/or terminal part of each scan line, c. means for alternately sampling said two types of signals at a frequency higher than the scanning frequency, d. means comprising a scanned energy beam for recording the composite sampled signals and said separation level signal in monochrome on a raster on a recording medium, B. reproducing means comprising: a. means for scanning each raster on the recording means and recovering the said composite signal therefrom, b. means utilizing the non-overlap in sampled signal levels and separation level signal for separating the two types of sampled signals, and c. means comprising envelope detectors for detecting And producing two continuous signals from the two types of sampled signals.

Claim 35

A system for recording and reproducing two types of simultaneously produced corresponding amplitude modulation information signals, said signals being produced for arrangement of information in sequential frames, each frame comprising a scanning raster, each raster in turn comprising a plurality of scan lines, each scan line comprising information signals between blanking or retrace signals, said system including: A. recording means comprising: a. means for adding different fixed bias signals to the center levels of each type of information signal to provide adjusted center levels such the the intensities of the signals do not overlap, b. means for producing standard level signals comprising signals corresponding to each of said adjusted center levels, said standard level signals being produced during the initial and/or terminal part of each scan line, c. means for alternately sampling said two types of signals at a frequency higher than the scanning frequency, d. means comprising a scanned energy beam for recording the composite sampled signals and said standard level signals in monochrome on a raster on a recording medium, B. reproducing means comprising: a. means for scanning each raster on the recording means and recovering the said composite signal therefrom, b. means utilizing the non-overlap in sampled signal levels and said standard signals for separating the two types of sampled signals, and c. means comprising envelope detectors for detecting and producing two continuous signals from the two types of sampled signals.

Claim 36

A system for recording and reproducing two types of simultaneously produced corresponding amplitude modulation information signals, said signals being produced for arrangement of information in sequential frames, each frame comprising a scanning raster, each raster in turn comprising a plurality of scan lines, each scan line comprising information signals between blanking or retrace signals, said system including: A. recording means comprising: a. means for adding different fixed bias signals to the center levels of each type of information signal to provide adjusted center levels such the the intensities of the signals do not overlap, b. means for producing standard level signals comprising signals corresponding to each of said adjusted center levels, said standard level signals being produced during the initial and/or terminal part of each scan line, c. means for alternately sampling said two types of signals at a frequency higher than the scanning frequency, d. means comprising a scanned energy beam for recording the composite sampled signals and said standard level signals in monochrome on a raster on a recording medium, B. reproducing means comprising: a. means for scanning each raster on the recording means and recovering the said composite signal therefrom, b. means utilizing the non-overlap in sampled signal levels and said standard signals for separating the two types of sampled signals, and c. means comprising envelope detectors for detecting and producing two continuous signals from the two types of sampled signals.