Ultra small video camera and a video camera system

• US 5,646,684 A
• Filed: 08/08/1995
• Issued: 07/08/1997
• Est. Priority Date: 08/22/1994
• Status: Expired due to Term

• Current Assignee: Hitachi Maxell Limited (Maxell, Ltd.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Nishizawa, Akihito, Koshio, Kazuhiro, Kinugasa, Toshiro, Imaide, Takuya, Iguchi, Takuya
• Primary Examiner(s): HSIA, SHERRIE Y
• Application Number:
  US08/512,625
• Time in Patent Office: 700 Days
• Field of Search: 348/222, 348/231, 348/233, 348/239, 348/240, 348/372, 358/909.1, 358/906
• US Class Current: 348/231.8
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/77 between a recording apparatus and a television camera
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/781 on disks or drums
• CPC Class Codes: H04N 5/907 using static stores, e.g. storage tubes or semiconductor memories H04N5/91 takes precedence
• CPC Class Codes: H04N 5/926 by pulse code modulation H04N5/919 takes precedence
• CPC Class Codes: H04N 9/8042 involving data reduction

Abstract

Image data photographed by a video camera 20 is compressed by a compression and decompression circuit 5, the compressed image data is recorded in an incorporated type semiconductor memory 6 or disk-type memory 13 fixed in the video camera 20 and the recorded image data is transferred to an external recording device 23. Further, the external recording device 23 records the transferred image data in a data storage while it is being compressed. The video camera 20 receives, decompresses and converts into a television signal the compressed image data read by the external recording device 23 in a reproducing operation. A video camera system capable of recording and reproducing long hours of image data by using a video camera having an ultra small size comparable to that of an 8 mm video cassette can be realized by using such a construction.

Claims

1. A video camera comprising:

image pickup elements for photoelectrically converting an optical image;

a driving circuit for driving the image pickup elements;

a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

a compression circuit for forming compressed image data by performing a predetermined data compression processing on the dynamic image data;

a memory for storing the compressed image data;

a digital signal outputting means for outputting the compressed image data read from the memory to the outside of a main body of the video camera;

a television signal inputting means for inputting television signals from the outside and a television signal processing circuit for converting the television signals inputted from the television signal inputting means into dynamic image data; and

wherein the compression circuit performs a data compression processing on the dynamic image data converted by the television signal processing circuit to thereby form compressed image data.

2. A video camera comprising:

image pickup elements for photoelectrically converting an optical image;

a driving circuit for driving the image pickup elements;

a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

a compression circuit for forming compressed image data by performing a predetermined data compression processing on the dynamic image data;

a memory for storing the compressed image data;

a digital signal outputting means for outputting the compressed image data read from the memory to the outside of a main body of the video camera; and

a communication circuit for sending the compressed image data read from the memory to an outside communications network.

3. A video camera system comprising:

(a) a main body of a video camera including;

(1) image pickup elements for photoelectrically converting an optical image;

(2) a driving circuit for driving the image pickup elements;

(3) a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

(4) a compression circuit for forming compressed image data by performing a predetermined data compression processing on the dynamic image data;

(5) a first memory for storing the compressed image data; and

(6) a first digital signal outputting means for outputting the compressed image data read from the first memory to the outside of the main body of the video camera; and

(b) an external recording device including;

(1) a first digital signal inputting means attachably and detachably connected to the first digital signal outputting means of the main body of the video camera for inputting the compressed image data; and

(2) a second memory for storing the compressed image data inputted by the first digital signal inputting means, said second memory having a capacity larger than a capacity of the first memory;

wherein the first digital signal outputting means is a first light emitting element for converting an electric signal representing the compressed image data into a light signal and outputting the light signal to the outside of the main body of the video camera, and the first digital signal inputting means is a first light receiving element for converting the light signal received from the first light emitting element into an electric signal.

4. A video camera system according to claim 3, wherein the external recording device further includes a second digital signal outputting means for outputting the compressed image data read from the second memory, and the main body of the video camera further includes a second digital signal inputting means attachably and detachably connected to the second digital signal outputting means of the external recording device for inputting the compressed image data, a decompression circuit for decompressing the compressed image data inputted by the second digital signal inputting means, a television signal processing circuit for converting dynamic image data decompressed by the decompression circuit into a television signal and a television signal outputting means for outputting the television signal to the outside of the main body of the video camera.

5. A video camera system according to claim 4, wherein the first digital signal outputting means and the second digital signal inputting means constitute a first digital signal inputting and outputting terminal for transferring data in both input and output directions, and the first digital signal inputting means and the second digital signal outputting means constitute a second digital signal inputting and outputting terminal attachably and detachably connected to the first digital signal inputting and outputting terminal.

6. A video camera system according to claim 4, wherein the second digital signal outputting means is a second light emitting element for converting an electric signal representing compressed image data into a light signal and outputting the light signal to the outside of the external recording device, and the second digital signal inputting means is a second light receiving element for converting the light signal from the second light emitting element again into an electric signal.

7. A video camera system according to claim 6, wherein the television signal outputting means is a third light emitting element for converting the television signal into a light signal and outputting the light signal to the outside of the main body of the video camera, and the external recording device further includes a third light receiving element for converting the light signal from the third light emitting element again into an electric signal and a television signal output terminal for outputting the television signal from the third light receiving element to the outside of the external recording device.

8. A video camera system comprising:

(a) a main body of a video camera including;

(1) image pickup elements for photoelectrically converting an optical image;

(2) a driving circuit for driving the image pickup elements;

(3) a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

(4) a compression circuit for forming compressed image data by performing a predetermined data compression processing on the dynamic image data;

(5) a first memory for storing the compressed image data; and

(6) a first digital signal outputting means for outputting the compressed image data read from the first memory to the outside of the main body of the video camera; and

(b) an external recording device including;

(1) a first digital signal inputting means attachably and detachably connected to the first digital signal outputting means of the main body of the video camera for inputting the compressed image data; and

(2) a second memory for storing the compressed image data inputted by the first digital signal inputting means, said second memory having a capacity larger than a capacity of the first memory;

wherein the main body of the video camera further includes a television signal inputting means for inputting television signals from the outside of the main body of the video camera and a television signal processing circuit for forming dynamic image data by performing a predetermined signal processing on the television signals.

9. A video camera system comprising:

(a) a main body of a video camera including;

(1) image pickup elements for photoelectrically converting an optical image;

(2) a driving circuit for driving the image pickup elements;

(3) a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

(4) a compression circuit for forming compressed image data by performing a predetermined data compression processing on the dynamic image data;

(5) a first memory for storing the compressed image data; and

(6) a first digital signal outputting means for outputting the compressed image data read from the first memory to the outside of the main body of the video camera; and

(b) an external recording device including;

(1) a first digital signal inputting means attachably and detachably connected to the first digital signal outputting means of the main body of the video camera for inputting the compressed image data; and

(2) a second memory for storing the compressed image data inputted by the first digital signal inputting means, said second memory having a capacity larger than a capacity of the first memory;

wherein the first digital signal outputting means is connected to the first digital signal inputting means by mounting the main body of the video camera at a predetermined location with respect to the external recording device and using light communication means to effect communication therebetween.

10. A video camera system comprising:

(a) a main body of a video camera including;

(1) image pickup elements for photoelectrically converting an optical image;

(2) a driving circuit for driving the image pickup elements;

(3) a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

(4) a compression circuit for forming compressed image data by performing a predetermined data Compression processing on the dynamic image data;

(5) a first memory for storing the compressed image data; and

(6) a first digital signal outputting means for outputting the compressed image data read from the first memory to the Outside of the main body of the video camera; and

(b) an external recording device including;

(1) a first digital signal inputting means attachably and detachably connected to the first digital signal outputting means of the main body of the video camera for inputting the compressed image data; and

(2) a second memory for storing the compressed image data inputted by the first digital signal inputting means, said second memory having a capacity larger than a capacity of the first memory;

wherein the external recording device further includes an AC adapter for forming a direct current power source from an alternating current power source and a power source output terminal for outputting direct current from the direct current power source, and the main body of the video camera further includes a power source input terminal for inputting the direct current from the power source output terminal and a battery capable of being charged by being supplied with the direct current inputted via the power source input terminal; and

wherein the battery is charged while the compressed image data is being transferred from the first digital signal outputting means to the first digital signal inputting means.

11. A video camera system according to claim 10, wherein the first digital signal outputting means is connected to the first digital signal inputting means and the power source output terminal is connected to the power source input terminal by mounting the main body of the video camera at a predetermined location with respect to the external recording device.

12. A video camera system comprising:

(a) a main body of a video camera including;

(1) image pickup elements for photoelectrically converting an optical image;

(2) a driving circuit for driving the image pickup elements;

(3) a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

(4) a compression circuit for forming compressed image data by performing a predetermined data compression processing on the dynamic image data;

(5) a first memory for storing the compressed image data;

(6) a first digital signal inputting and outputting means for outputting the compressed image data read from the first memory to an outside of the main body of the video camera and for inputting the compressed image data from the outside thereof;

(7) a decompression circuit for forming dynamic image data by performing a decompression processing on the compressed image data inputted by the first digital signal inputting and outputting means;

(8) a television signal processing circuit for forming a television signal by performing a predetermined signal processing on the dynamic image data received from the decompression circuit; and

(9) a television signal outputting means for outputting the television signal to the outside of the main body of the video camera; and

(b) an external recording device including;

(1) a second digital signal inputting and outputting means attachably and detachably connected to the first digital signal inputting and outputting means of the main body of the video camera for inputting the compressed image data from the main body of the video camera and for outputting the compressed image data to the main body of the video camera; and

(2) a second memory for storing the compressed image data inputted by the first digital signal inputting and outputting means and for supplying the stored compressed image data to the second digital signal inputting and outputting means, said second memory having a capacity larger than a capacity of the first memory;

wherein the first and the second digital signal inputting and outputting means each comprises light emitting elements for convening an electric signal representing the compressed image data into a light signal and for outputting the light signal to the outside thereof and light receiving elements for converting an inputted light signal into an electric signal.

13. A video camera system comprising:

(a) a main body of a video camera including;

(1) image pickup elements for photoelectrically converting an optical image;

(2) a driving circuit for driving the image pickup elements;

(3) a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

(4) a compression circuit for forming compressed image data by performing a predetermined data compression processing on the dynamic image data;

(5) a first memory for storing the compressed image data;

(6) a first digital signal inputting and outputting means for outputting the compressed image data read from the first memory to an outside of the main body of the video camera and for inputting the compressed image data from the outside thereof;

(7) a decompression circuit for forming dynamic image data by performing a decompression processing on the compressed image data inputted by the first digital signal inputting and outputting means;

(8) a television signal processing circuit for forming a television signal by performing a predetermined signal processing on the dynamic image data received from the decompression circuit; and

(9) a television signal outputting means for outputting the television signal to the outside of the main body of the video camera; and

(b) an external recording device including;

(1) a second digital signal inputting and outputting means attachably and detachably connected to the first digital signal inputting and outputting means of the main body of the video camera for inputting the compressed image data from the main body of the video camera and for outputting the compressed image data to the main body of the video camera; and

(2) a second memory for storing the compressed image data inputted by the first digital signal inputting and outputting means and for supplying the stored compressed image data to the second digital signal inputting and outputting means, said second memory having a capacity larger than a capacity of the first memory;

wherein the main body of the video camera further includes television signal inputting means for inputting a television signal from the outside, and the television signal processing circuit forms the dynamic image data by performing a predetermined signal processing on the television signal.

14. A video camera system comprising:

(a) a main body of a video camera including;

(1) image pickup elements for photoelectrically converting an optical image;

(2) a driving circuit for driving the image pickup elements;

(3) a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

(4) a compression circuit for forming compressed image data by performing a predetermined data compression processing on the dynamic image data;

(5) a first memory for storing the compressed image data;

(6) a first digital signal inputting and outputting means for outputting the compressed image data read from the first memory to an outside of the main body of the video camera and for inputting the compressed image data from the outside thereof;

(7) a decompression circuit for forming dynamic image data by performing a decompression processing on the compressed image data inputted by the first digital signal inputting and outputting means;

(8) a television signal processing circuit for forming a television signal by performing a predetermined signal processing on the dynamic image data received from the decompression circuit; and

(9) a television signal outputting means for outputting the television signal to the outside of the main body of the video camera; and

(b) an external recording device including;

(1) a second digital signal inputting and outputting means attachably and detachably connected to the first digital signal inputting and outputting means of the main body of the video camera for inputting the compressed image data from the main body of the video camera and for outputting the compressed image data to the main body of the video camera; and

(2) a second memory for storing the compressed image data inputted by the first digital signal inputting and outputting means and for supplying the stored compressed image data to the second digital signal inputting and outputting means, said second memory having a capacity larger than a capacity of the first memory;

wherein the external recording device further includes an AC adapter for forming a direct current power source from an alternating current power source and a power source output terminal for outputting direct current from the direct current power source, the main body of the video camera further includes a power source input terminal for inputting the direct current from the power source output terminal and a battery capable of being charged by being supplied with the direct current inputted via the power source input terminal, and the battery is charged while the compressed image data is being transferred from the first digital signal inputting and outputting means to the second digital signal inputting and outputting means.

15. A video camera system comprising:

(a) a main body of a video camera including;

(1) image pickup elements for photoelectrically converting an optical image;

(2) a driving circuit for driving the image pickup elements;

(3) a signal processing circuit for forming predetermined dynamic image data by performing a predetermined signal processing on an output signal of the image pickup elements;

(4) a compression circuit for forming compressed image data by performing a predetermined data compression processing on the dynamic image data;

(5) a first memory for storing the compressed image data;

(6) a first digital signal inputting and outputting means for outputting the compressed image data read from the first memory to an outside of the main body of the video camera and for inputting the compressed image data from the outside thereof;

(7) a decompression circuit for forming dynamic image data by performing a decompression processing on the compressed image data inputted by the first digital signal inputting and outputting means;

(8) a television signal processing circuit for forming a television signal by performing a predetermined signal processing on the dynamic image data received from the decompression circuit; and

(9) a television signal outputting means for outputting the television signal to the outside of the main body of the video camera; and

(b) an external recording device including;

(1) a second digital signal inputting and outputting means attachably and detachably connected to the first digital signal inputting and outputting means of the main body of the video camera for inputting the compressed image data from the main body of the video camera and for outputting the compressed image data to the main body of the video camera; and

(2) a second memory for storing the compressed image data inputted by the first digital signal inputting and outputting means and for supplying the stored compressed image data to the second digital signal inputting and outputting means, said second memory having a capacity larger than a capacity of the first memory;

wherein the external recording device further includes an AC adapter for forming a direct current power source from an alternating current power source and a power source output terminal for outputting direct current from the direct current power sources the main body of the video camera further includes a power source input terminal for inputting the direct current from the power source output terminal and a battery capable of being charged by being supplied with the direct current inputted via the power source input terminal, and the battery is charged while the compressed image data is being transferred from the first digital signal inputting and outputting means to the second digital signal inputting and outputting means;

wherein the first digital signal inputting and outputting means is connected to the second digital signal inputting and outputting means and the power source output terminal is connected to the power source input terminal by mounting the main body of the video camera at a predetermined location with respect to the external recording device.