Electronic camera with digital signal processing circuit

• US 5,111,283 A
• Filed: 02/20/1990
• Issued: 05/05/1992
• Est. Priority Date: 02/20/1989
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kawamura, Hideaki, Nagasawa, Kenichi
• Primary Examiner(s): Groody, James J.
• Assistant Examiner(s): Metjahic, Safet
• Application Number:
  US07/481,180
• Time in Patent Office: 805 Days
• Field of Search: 358/209, 358/41, 358/43, 358/47, 358/50, 358/909, 358/906, 358/13, 358/13 C, 358/133, 358/335
• US Class Current: 348/231.3
• CPC Class Codes: H04N 1/646 Transmitting or storing colour television type signals, e.g. PAL, Lab; Their conversion into additive or subtractive colour signals or vice versa therefor H04N1/642, H04N1/644 take precedence
• CPC Class Codes: H04N 9/8045 using predictive coding

Abstract

An electronic camera for storing in a storage medium digital data corresponding to an object image. The camera is arranged to image an object, to form a plurality of categories of digital data respectively corresponding to the object, to successively output the categories of digital data formed, to encode at least two of the categories of digital data successively output, and to store the encoded digital data in the storage medium. The electronic camera is thus designed to be reduced in size, weight and cost, and to store a large amount of digital data in the storage medium.

Claims

1. An electronic camera for storing in a storage medium digital data corresponding to an object image, said camera comprising:

(A) digital data forming means for imaging an object and forming a plurality of categories of digital data corresponding to the object image;

(B) a plurality of memories respectively supplied with the plurality of categories of digital data formed by said digital data forming means, said memories successively storing the plurality of categories of data supplied;

(C) data selection/output means for successively selecting and outputting the categories of digital data stored in said plurality of memories;

(D) one encoding means for encoding the plurality of categories of digital data successively output from said selection/output means and for outputting the encoded data; and

(E) storage means for storing the digital data output from said encoding means in the storage medium.

2. An electronic camera according to claim 1, wherein said digital data forming means is arranged to image the object, to form a category of luminance information data and a category of color information data corresponding to the object and to output these categories of data.

3. An electronic camera according to claim 1, wherein said encoding means is arranged to encode the plurality of categories of digital data successively output from said selection/output means and to output the encoded data.

4. An electronic camera according to claim 1, wherein said storage means includes:

(A) a storage medium for storing the digital data output from said encoding means, said storage medium being detachably mounted on the main body of the electronic camera; and

(B) storing operation control means for controlling the operation of storing the digital data output from said encoding means in said storage medium.

5. An electronic camera for storing in a storage medium digital data corresponding to an object image, said camera comprising:

(A) information data forming means for imaging an object, forming luminance information data and color information data respectively corresponding to the object image, and successively outputting these categories of data;

(B) a luminance information data memory for successively storing the luminance information data formed by said information data forming means and for successively outputting the stored luminance information data;

(C) a color information data memory for successively storing the color information formed by said information data forming means and for successively outputting the stored color information data; and

(D) data selection/output means for selectively and successively outputting the luminance information data successively output from said luminance information data memory and the color information data successively output from said color information data memory;

(E) a single encoding means for encoding of the luminance information data and the color information data successively output from said data selection/output means, and for outputting the encoded data; and

(F) storage means for storing in the storage medium the encoded data output from said encoding means.

6. An electronic camera according to claim 5, wherein said encoding means is arranged to encode, in a differential encoding manner, the luminance information data and the color information data successively output from said data selection/output means and to output the differentially encoded data.

7. An electronic camera according to claim 5, wherein said storage means includes:

(A) a storage medium for storing the data encoded in and output from said encoding means, said storage medium being detachably mounted on the main body of the electronic camera; and

(B) storing operation control means for controlling the operation of storing in said storage medium the data encoded in and output from said encoding means.

8. An image signal output device for reading out data stored in a storage medium which data includes a plurality of different categories of image data which are encoded, and for forming and outputting image signals corresponding to the encoded data read out, said image signal output device comprising:

(A) data decoding means for reading out the encoded data stored in the storage medium and for decoding the read-out encoded data to successively output the plurality of different categories of image data;

(B) output means for simultaneously outputting the decoded plurality of categories of image data successively output from said data decoding means; and

(C) image signal forming means for forming image signals by using the plurality of categories of image data simultaneously output from said plurality of memories, and for outputting the formed image signals.

13. An image signal output device according to claim 8, wherein the plurality of categories of image data include luminance information data and color information data.

14. An image signal output device according to claim 8, wherein said device is arranged to detachably mount the storage medium.

9. An image signal output device for reading out encoded data stored in a storage medium which data includes luminance information data and color information data, and for forming and outputting image signals corresponding to the read-out encoded data, said image signal output device comprising:

(A) data decoding means for reading out the encoded data stored in the storage medium and for decoding the read-out encoded data to successively output the luminance information data and the color information data;

(B) a luminance information data memory for successively storing the luminance information data output from said data decoding means, successively reading out the stored luminance information data at a first data rate, and outputting the read-out luminance information data;

(C) a color information data memory for successively storing the color information output from said data decoding means, successively reading out the stored color information data at a rate lower than the first rate, and outputting the color information data simultaneously with the luminance information data output from said luminance information data memory; and

(D) image signal forming means for forming image signals by using the luminance information data output from said luminance information data memory and the color information data output from said color information data memory, and for outputting the formed image signals.

10. An image signal output device according to claim 9, wherein said data decoding means is arranged to read out the encoded data stored in the storage medium, to decode the read-out encoded data in a differential decoding manner, and to successively output the decoded luminance information data and the decoded color information data.

11. An image signal output device according to claim 9, wherein said image signal forming means includes:

first conversion means for converting the luminance information data output from said luminance information data memory into a luminance information signal and for outputting the luminance information signal;

second conversion means for converting the color information data output from said color information data memory into a color information signal and for outputting the said color information signal; and

composite color image signal forming means for forming a composite color image signal by using the luminance signal output from said first conversion means and the color information signal output from said second conversion means.

12. An image signal output device according to claim 9, wherein a main body of the device is arranged to detachably mount the storage medium device.