Dual mode electronic camera having a large recording capacity

• US 5,751,350 A
• Filed: 01/15/1997
• Issued: 05/12/1998
• Est. Priority Date: 09/20/1993
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Tanaka, Satomi
• Primary Examiner(s): Faile, Andrew
• Assistant Examiner(s): Ho, Tuan V.
• Application Number:
  US08/783,322
• Time in Patent Office: 482 Days
• Field of Search: 348/207, 348/220, 348/231, 348/232, 358/906
• US Class Current: 348/231.99
• CPC Class Codes: H04N 1/00129 with a display device, e.g. CRT or LCD monitor with a television apparatus H04N1/00283; arrangements for control of display devices G09G
• CPC Class Codes: H04N 1/00204 with a digital computer or a digital computer system, e.g. an internet server programmed control between transmitter and receiver or between image input and image output device H04N1/32561
• CPC Class Codes: H04N 1/2112 using still video cameras
• CPC Class Codes: H04N 1/2137 with temporary storage before final recording, e.g. in a frame buffer
• CPC Class Codes: H04N 1/2141 in a multi-frame buffer
• CPC Class Codes: H04N 1/215 Recording a sequence of still pictures, e.g. burst mode
• CPC Class Codes: H04N 1/2158 using a detachable storage unit
• CPC Class Codes: H04N 2101/00 Still video cameras
• CPC Class Codes: H04N 2201/212 Selecting different recording or reproducing modes, e.g. high or low resolution, field or frame
• CPC Class Codes: H04N 2201/216 Arrangements for recording on different types of storage medium, e.g. IC card or magnetic tape; Recording on a plurality of storage media
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/781 on disks or drums
• CPC Class Codes: H04N 5/85 on discs 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 5/9267 using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/8042 involving data reduction

Abstract

This invention relates to an electronic still camera to image a desired object through an imaging device, and provides a continuous-shot means with large-capacity recording. When image data RAW retrieved through predetermined imaging means 20 is data processed to record on a recording medium 10, the buffer memory 40 with high speed is provided which stores image data RAW temporarily.

Claims

1. An electronic still camera having a first operational mode for creating a single image of a light image from an object, and a second operational mode for continuously imaging said light image, said camera comprising:

an imaging device for at converting said light image to an output image signal;

image data processing means for processing said image signal into digital image data;

a first memory means for temporarily storing said image data from said image data processing means;

a second memory means for temporarily storing image data read out from said first memory means, said second memory means having a memory access time;

recording means for recording image data read out from said first memory means on a recording medium, said recording means having a recording access time which is longer than said memory access time;

compression means for compressing the image data from said first memory means;

switching means for selectively supplying said image data from said first memory means to said compression means and to said second memory means;

means for transmitting said image data from said second memory means to said recording means; and

control means for supplying the image data from said first memory means directly to at least one of said recording means and compression means in said first operational mode, and for supplying the image data from said first memory means to said second memory means in said second operational mode.

2. The electronic still camera according to claim 1, wherein said second memory means comprises a static random access memory (SRAM).

3. The electronic still camera according to claim 2, wherein said recording medium comprises a magneto-optical disc.

4. The electronic still camera according to claim 2, wherein said recording medium comprises a flash memory.

5. The electronic still camera according to claim 1, wherein said first memory means comprises a frame memory having memory capacity corresponding to one frame of said image data, said frame memory being connected with said image data processing means for temporarily storing said image data.

6. The electronic still camera according to claim 1, further comprising:

image converting means for converting the image data from said image data processing means into image data suitable for computer processing; and

switching means for selectively supplying said image data to said image converting means and said second memory means,

wherein said control means controls said switching means to supply said image data to said image converting means in said first operational mode, and to supply said image data to said second memory means in said second operational mode.

7. The electronic still camera according to claim 6, wherein said image converting means converts each pixel data of said image data into square pixel data.

8. The electronic still camera according to claim 6, wherein said second memory means comprises a static random access memory (SRAM).

9. The electronic still camera according to claim 8, wherein said recording medium comprises a magneto-optical disc.

10. The electronic still camera according to claim 8, wherein said recording medium comprises a flash memory.

11. The electronic still camera according to claim 1, wherein said control means supplies the image data from said second memory means to at least one of said recording means and said compression means after supplying the image data from said first memory means to said second memory means.

12. The electronic still camera according to claim 1, wherein when said second operational mode is selected, said control means supplies a first portion of the image data from said first memory means directly to at least one of said recording means and said compression means, and said control means supplies a second portion of the image data from said first memory means to said second memory means.

13. An electronic still camera having a first operational mode for creating a single image of a light image from an object, and a second operational mode for continuously imaging said light image, said camera comprising:

an imaging device for at converting said light image to an output image signal;

image data processing means for processing said image signal into digital image data;

a memory means for temporarily storing image data, said memory means having a memory access time;

recording means for recording said image data on a recording medium, said recording means having a recording access time which is longer than said memory access time;

means for transmitting said image data from said memory means to said recording means; and

control means for supplying the image data from said image data processing means to said recording means without storing said image data in said memory means in said first operational mode, and for supplying the image data from said image data processing means to said memory means in said second operational mode, wherein said control means, in said second operational mode, supplies a first portion of the image data from said image data processing means to said recording means without storing said first portion in said memory means, and supplies a second portion of the image data from said image data processing means to said memory means.

14. The electronic still camera according to claim 13, wherein said memory means comprises a buffer memory, said camera further comprising a frame memory means separate from said buffer memory for temporarily storing said image data from said image data processing means, and a switching means for selectively supplying image data read out from said frame memory means to said buffer memory and said recording means.

15. An electronic still camera having a first operational mode for creating a single image of a light image from an object, and a second operational mode for continuously imaging said light image, said camera comprising:

an imaging device for at converting said light image to an output image signal;

image data processing means for processing said image signal into digital image data;

a memory means for temporarily storing image data, said memory means having a memory access time;

recording means for recording said image data on a recording medium, said recording means having a recording access time which is longer than said memory access time;

means for transmitting said image data from said memory means to said recording means; and

control means for supplying the image data from said image data processing means to said recording means without storing said image data in said memory means in said first operational mode, and for supplying a first image data from said image data processing means to said recording means without storing said first image data in said memory means in said second operational mode, and a second image data following said first image data to the memory means in said second operational mode.