Electronic still picture photography system

Claim 2

An electronic still picture photography system comprising: (a) an electronic camera (100) including an image pick-up circuit (1) for converting an optical image into a picture signal and a modulation circuit (2) for generating a modulated picture signal which is modulated by the picture signal produced from said image pick-up circuit; (b) a magnetic recording medium (13) including a plurality of magnetic tracks formed thereon; (c) a magnetic head (8) arranged adjacent to said magnetic recording medium and selectively connected to said modulation circuit of said electronic camera, said magnetic head being supplied with said modulated picture signal produced from said modulation circuit, said modulated picture signal being converted into a magnetic signal, said magnetic signal being recorded on a magnetic track on said magnetic recording medium, said magnetic head detecting the magnetic signal as required which is recorded on said magnetic recording medium; (d) a magnetic recording medium drive unit (14) for rotating said magnetic recording medium at a predetermined velocity; (e) a mode input device (16) at least including a recording button (161) for instructing said magnetic recording medium to record the magnetic signal corresponding to said optical image and a manual button (164) for selectively indicating the magnetic track formed on said magnetic recording medium; (f) a control circuit (15) connected to said mode input device for generating a code signal corresponding to the data representing the conditions of said recording button and said manual button; (g) a sync signal amplifier circuit (4) connected to said image pick-up device of said electronic camera for amplifying a sync signal supplied from said image pick-up device; (h) a code signal generator circuit (44) connected to said sync signal amplifier circuit and said control circuit, said code signal generator circuit being supplied with the sync signal from said sync signal amplifier circuit and a code signal from said control circuit, said code signal generator converting the code signal into a sync code signal in synchronism with said sync signal, said code signal generator circuit generating a modulated code signal which is modulated by the converted code signal; (i) a mixer circuit (31) inserted between said modulation circuit of the electronic camera and said magnetic head and connected to said code signal generator circuit for mixing the modulated code signal which is generated by said code signal generator circuit with the modulated picture signal supplied from said modulation circuit; (j) a magnetic head drive unit (7) connected to said control circuit and holding said magnetic head, said magnetic head drive unit being supplied with the code signal from said control circuit, said head drive unit moving said magnetic head onto a required magnetic track in accordance with the supplied code signal; (k) an amplifier circuit (32) connected selectively to said magnetic head for amplifying the modulated code signal and the modulated picture signal detected by said magnetic head from said magnetic recording medium; (Q) a demodulation circuit (10) connected to said amplifier circuit for converting said modulated picture signal into a demodulated picture signal; (m) a sync signal separator circuit (12) connected to said demodulation circuit for separating the sync signal from the demodulated picture signal supplied thereto; and (n) a code signal reproduction circuit (11) connected to said amplifier circuit and said sync signal separator circuit and supplied with a modulated code signal from said amplifier circuit, said code signal reproduction circuit demodulating said modulated code signal into a code signal and supplying said demodulated code signal to said control circuit.

Claim 3

An electronic still picture photography system according to Claim 1, wherein a one-bit data length of the code signal generated by said code signal generator circuit is selected to be a time length n times (n: integral number) a period of the horizontal sync signal.

Claim 4

An electronic still picture photography system according to Claim 2, wherein said integral number n is four.

Claim 5

An electronic still picture photography system according to Claim 1, wherein a frequency of the modulated code signal generated by said code signal generator circuit is 13 times a frequency of the horizontal sync signal.

Claim 6

An electronic still picture photography system comprising: (a) an electronic camera (100) including an image pick-up circuit (1) for converting an optical image into a picture signal and a modulation circuit (2) for generating a modulated picture signal modulated by the picture signal produced from said image pick-up circuit; (b) a magnetic recording medium (13) including a plurality of magnetic tracks formed thereon; (c) a magnetic head (8) arranged adjacent to said magnetic recording medium and selectively connected to said modulation circuit of said electronic camera, said magnetic head being supplied with the modulated picture signal from said modulation circuit, said modulated picture signal being converted into a magnetic signal, said magnetic signal being recorded on a magnetic track on said magnetic recording medium, said magnetic head detecting the magnetic signal as required recorded on said magnetic recording medium; (d) a magnetic recording medium drive unit (14) for rotating said magnetic recording medium at a predetermined velocity; (e) a mode input device (16) including a recording button (161) at least for instruction said magnetic recording medium to record the magnetic signal corresponding to said optical image, a change-over switch (162) at least for switching between a first state in which the magnetic signal corresponding to one optical image to be recorded on the magnetic recording medium is recorded on a pair of first and second tracks as a frame signal and a second state in which the magnetic signal corresponding to one optical image to be recorded is recorded on one magnetic track as a field signal, and a manual button (164) for selectively indicating the magnetic track formed on the magnetic recording medium; (f) a control circuit (15) connected to the mode input device for generating a code signal corresponding to the data representing by the conditions of said recording button, said change-over switch and said manual button respectively; (g) a sync signal amplifier circuit (4) connected to said image pick-up device of said electronic camera for amplifying the sync signal supplied from said image pick-up device; (h) a code signal generator circuit (44) connected to said sync signal amplifier circuit and said control circuit, said code signal generator circuit being supplied with the sync signal from said sync signal amplifier circuit and the code signal from said control circuit, said code signal generator circuit converting the code signal into a sync code signal in synchronism with said sync signal, said code signal generator circuit generating a modulated code signal which is modulated by the converted code signal; (i) a mixer circuit (31) inserted between said modulation circuit of the electronic camera and said magnetic head and connected to said code signal generator circuit for mixing the modulated code signal which is generated by said code signal generator circuit with the modulated picture signal supplied from said modulation circuit; (j) a magnetic head drive unit (7) connected to said control circuit and holding said magnetic head, said magnetic head drive unit being supplied with the code signal from said control circuit, said head drive unit moving said magnetic head onto the required magnetic track in accordance with the supplied code signal; (k) an amplifier circuit (32) connected selectively to said magnetic head for amplifying the modulated code signal and the modulated picture signal detected by said magnetic head from said magnetic recording medium; (Q) a demodulation circuit (10) connected to said amplifier circuit for converting said modulated picture signal into a demodulated picture signal; (m) a sync signal separator circuit (12) connected to said demodulation circuit for separating the sync signal from the demodulated picture signal supplied thereto; and (n) a code signal reproduction circuit (11) connected to said amplifier circuit and said sync signal separator circuit and supplied with a modulated code signal from said amplifier circuit, said code signal reproduction circuit demodulating the modulated code signal into a code signal and supplying the demodulated code signal to said control circuit.

Claim 7

An electronic still picture photography system comprising: (a) an electronic camera (100) including an image pick-up circuit (1) for converting an optical image into a picture signal and a modulation circuit (2) for generating a modulated picture signal modulated by the picture signal produced from said image pick-up circuit; (b) a magnetic recording medium (13) including a plurality of magnetic tracks formed thereon; (c) a magnetic head (8) arranged adjacent to said magnetic recording medium and selectively connected to said modulation circuit of said electronic camera, said magnetic head being supplied with the modulated picture signal from said modulation circuit, said modulated picture signal being converted into a magnetic signal, said magnetic signal being recorded on a magnetic track on said magnetic recording medium, said magnetic head detecting the magnetic signal as required recorded on said magnetic recording medium; (d) a magnetic recording medium drive unit (14) for rotating said magnetic recording medium at a predetermined velocity; (e) a mode input device (16) including a recording button (161) at least for instruction said magnetic recording medium to record the magnetic signal corresponding to said optical image, a change-over switch (162) at least for switching between a first state in which the magnetic signal corresponding to one optical image to be recorded on the magnetic recording medium is recorded on a pair of first and second tracks as a frame signal and a second state in which the magnetic signal corresponding to one optical image to be recorded is recorded on one magnetic track as a field signal, and a manual button (164) for selectively indicating the magnetic track formed on the magnetic recording medium; (f) a control circuit (15) connected to the mode input device for generating a code signal corresponding to the data representing by the conditions of said recording button, said change-over switch and said manual button respectively; (g) a sync signal amplifier circuit (4) connected to said image pick-up device of said electronic camera for amplifying the sync signal supplied from said image pick-up device; (h) a code signal generator circuit (44) connected to said sync signal amplifier circuit and said control circuit, said code signal generator circuit being supplied with the sync signal from said sync signal amplifier circuit and the code signal from said control circuit, said code signal generator circuit converting the code signal into a sync code signal in synchronism with said sync signal, said code signal generator circuit generating a modulated code signal which is modulated by the converted code signal; (i) a mixer circuit (31) inserted between said modulation circuit of the electronic camera and said magnetic head and connected to said code signal generator circuit for mixing the modulated code signal which is generated by said code signal generator circuit with the modulated picture signal supplied from said modulation circuit; (j) a magnetic head drive unit (7) connected to said control circuit and holding said magnetic head, said magnetic head drive unit being supplied with the code signal from said control circuit, said head drive unit moving said magnetic head onto the required magnetic track in accordance with the supplied code signal; (k) an amplifier circuit (32) connected selectively to said magnetic head for amplifying the modulated code signal and the modulated picture signal detected by said magnetic head from said magnetic recording medium; (Q) a demodulation circuit (10) connected to said amplifier circuit for converting said modulated picture signal into a demodulated picture signal; (m) a sync signal separator circuit (12) connected to said demodulation circuit for separating the sync signal from the demodulated picture signal supplied thereto; and (n) a code signal reproduction circuit (11) connected to said amplifier circuit and said sync signal separator circuit and supplied with a modulated code signal from said amplifier circuit, said code signal reproduction circuit demodulating the modulated code signal into a code signal and supplying the demodulated code signal to said control circuit.

Claim 8

An electronic still picture photography system according to Claim 4, wherein among the data generated by said contr 1 circuit, the data corresponding to the conditions of said change-over switch are 2-bit data, said data being the first data "10" of the frame signal indicating the first magnetic track and the second data "20" thereof indicating the second magnetic track under the first state of said change-over switch of said mode input device, said data being the data "11" under the second state of said change-over switch.

Claim 9

An electronic still picture photography system comprising: (a) a picture signal generator (100a) including a picture signal generator circuit (la) for generating a picture signal of a field period and a modulation circuit (2) for generating a modulated picture signal modulated by the picture signal; (b) a magnetic recording medium (13) including a plurality of magnetic tracks formed thereon; (c) a magnetic head (8) arranged adjacent to said magnetic recording medium and selectively connected to said modulation circuit of said electronic camera, said magnetic head being supplied with said modulated picture signal produced from said modulation circuit, said modulated picture signal being converted into a magnetic signal, said magnetic signal being recorded on a magnetic track on said magnetic recording medium, said magnetic head detecting the magnetic signal as required which is recorded on said magnetic recording medium; (d) a magnetic recording medium drive unit (14) for rotating said magnetic recording medium at a predetermined velocity; (e) a mode input device (16) at least including a recording button (161) for instructing said magnetic recording medium to record a magnetic signal corresponding to said optical image and a manual button (164) for selectively indicating the magnetic track formed on said magnetic recording medium; (f) a control circuit (15) connected to said mode input device for generating a code signal corresponding to the data representing the conditions of said recording button and said manual button; (g) a sync signal amplifier circuit (4) connected to said image pick-up device of said electronic camera for amplifying a sync signal supplied from said image pick-up device; (h) a code signal generator circuit (44) connected to said sync signal amplifier circuit and said control circuit, said code signal generator circuit being supplied with the sync signal from said sync signal amplifier circuit and a code signal from said control circuit, said code signal generator converting the code signal into a sync code signal in synchronism with said sync signal, said code signal generator circuit generating a modulated code signal which is modulated by the converted code signal; (i) a mixer circuit (31) inserted between said modulation circuit of the electronic camera and said magnetic head and connected to said code signal generator circuit for mixing the modulated code signal which is generated by said code signal generator circuit with the modulated picture signal supplied from said modulation circuit; (j) a magnetic head drive unit (7) connected to said control circuit and holding said magnetic head, said magnetic head drive unit being supplied with the code signal from said control circuit, said head drive unit moving said magnetic head onto a required magnetic track in accordance with the supplied code signal; (k) an amplifier circuit (32) connected selectively to said magnetic head for amplifying the modulated code signal and then modulated picture signal detected by said magnetic head from said magnetic recording medium; (t) a demodulation circuit (10) connected to said amplifier circuit for converting said modulated picture signal into a demodulated picture signal; (m) a sync signal separator circuit (12) connected to said demodulation circuit for separating the sync signal from the demodulated picture signal supplied thereto; (n) a code signal reproduction circuit (11) connected to said amplifier circuit and said sync signal separator circuit and supplied with a modulated code signal from said amplifier circuit, said code signal reproduction circuit demodulating said modulated code signal into a code signal and supplying said demodulated code signal to said control circuit.

Claim 10

An electronic still picture photography system comprising: (a) a picture signal generator (100a) including a picture signal generator circuit (la) for generating a picture signal of a field period and a modulation circuit (2) for generating a modulated picture signal modulated by the picture signal; (b) a magnetic recording medium (13) including a plurality of magnetic tracks formed thereon; (c) a magnetic head (8) arranged adjacent to said magnetic recording medium and selectively connected to said modulation circuit of said electronic camera, said magnetic head being supplied with said modulated picture signal produced from said modulation circuit, said modulated picture signal being converted into a magnetic signal, said magnetic signal being recorded on a magnetic track on said magnetic recording medium, said magnetic head detecting the magnetic signal as required which is recorded on said magnetic recording medium; (d) a magnetic recording medium drive unit (14) for rotating said magnetic recording medium at a predetermined velocity; (e) a mode input device (16) at least including a recording button (161) for instructing said magnetic recording medium to record a magnetic signal corresponding to said optical image and a manual button (164) for selectively indicating the magnetic track formed on said magnetic recording medium; (f) a control circuit (15) connected to said mode input device for generating a code signal corresponding to the data representing the conditions of said recording button and said manual button; (g) a sync signal amplifier circuit (4) connected to said image pick-up device of said electronic camera for amplifying a sync signal supplied from said image pick-up device; (h) a code signal generator circuit (44) connected to said sync signal amplifier circuit and said control circuit, said code signal generator circuit being supplied with the sync signal from said sync signal amplifier circuit and a code signal from said control circuit, said code signal generator converting the code signal into a sync code signal in synchronism with said sync signal, said code signal generator circuit generating a modulated code signal which is modulated by the converted code signal; (i) a mixer circuit (31) inserted between said modulation circuit of the electronic camera and said magnetic head and connected to said code signal generator circuit for mixing the modulated code signal which is generated by said code signal generator circuit with the modulated picture signal supplied from said modulation circuit; (j) a magnetic head drive unit (7) connected to said control circuit and holding said magnetic head, said magnetic head drive unit being supplied with the code signal from said control circuit, said head drive unit moving said magnetic head onto a required magnetic track in accordance with the supplied code signal; (k) an amplifier circuit (32) connected selectively to said magnetic head for amplifying the modulated code signal and then modulated picture signal detected by said magnetic head from said magnetic recording medium; (t) a demodulation circuit (10) connected to said amplifier circuit for converting said modulated picture signal into a demodulated picture signal; (m) a sync signal separator circuit (12) connected to said demodulation circuit for separating the sync signal from the demodulated picture signal supplied thereto; (n) a code signal reproduction circuit (11) connected to said amplifier circuit and said sync signal separator circuit and supplied with a modulated code signal from said amplifier circuit, said code signal reproduction circuit demodulating said modulated code signal into a code signal and supplying said demodulated code signal to said control circuit.

Claim 11

An electronic still picture photography system according to Claim 7, wherein the one-bit data length of the code signal generated by said code signal generator circuit is selected to be a time length n times (n: integral number) a period of the horizontal sync signal.

Claim 12

An electronic still picture photography system according to Claim 7, wherein the integral number n is four.

Claim 13

An electronic still picture photography system according to Claim 7, wherein a frequency of the modulated code signal generated by said code signal generator circuit is 13 times a frequency of the horizontal sync signal.