Image processing apparatus and terminal apparatus

• US 5,357,281 A
• Filed: 11/03/1992
• Issued: 10/18/1994
• Est. Priority Date: 11/07/1991
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Horii, Hiroyuki, Ikeda, Keiichi
• Primary Examiner(s): Britton, Howard W.
• Application Number:
  US07/970,782
• Time in Patent Office: 714 Days
• Field of Search: 358/133, 358/105, 358/85, 358/165, 358/210, 379/53, 348/17, 348/401, 348/402, 348/404, 348/632
• US Class Current: 375/240.12
• CPC Class Codes: H04N 19/117 Filters, e.g. for pre-processing or post-processing sub-band filter banks H04N19/635
• CPC Class Codes: H04N 19/126 Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
• CPC Class Codes: H04N 19/134 characterised by the element, parameter or criterion affecting or controlling the adaptive coding
• CPC Class Codes: H04N 19/137 Motion inside a coding unit, e.g. average field, frame or block difference
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/82 involving filtering within a prediction loop

Abstract

The present invention is directed to a terminal apparatus in which the in-frame compression factor of an image obtained by a camera is increased to restrict frame thinning when the camera is moved. A control circuit 60 performs control of a movable table 12. When a TV camera 10 is moved, the quantization table used in a quantization circuit 26 is changed over, whereby a higher compression factor of the coding conducted by a DCT circuit 24 and the quantization circuit 26 is achieved. Thus, a predetermined compression factor can be achieved without performing frame thinning.

Claims

1. An image processing apparatus comprising:

conversion means for converting an objective image into an image signal;

smoothing means for smoothing the image signal;

coding means for coding the image signal which has been smoothed by said smoothing means; and

control means for controlling said smooth means to smooth the image signal in accordance with a converting state of said conversion means.

2. The image processing apparatus according to claim 1, wherein said converting state comprises a moving or a non-moving state of said conversion means.

3. The image processing apparatus according to claim 1, wherein said conversion means converts the objective image into a moving image signal.

4. The image processing apparatus according to claim 1, further comprising means for orthogonally transforming the image signal, and quantization means for quantizing the image signal which has been orthogonally transformed by said orthogonal transform means.

5. The image processing apparatus according to claim 4, wherein said control means further controls quantization characteristics of said quantization means in accordance with the converting state of said conversion means.

6. An apparatus comprising:

image pick-up means for outputting an image signal based on an object image; and

compression means for in-frame or interframe compression coding an image signal output by said image pick-up means, a compression ratio of said compression means increasing when said image pick-up means is moved.

7. The apparatus according to claim 6, wherein said compression means gives the in-frame compression a priority when said image pick-up means is moved.

8. The apparatus according to claim 6, wherein said compression means performs compression coding using changed-over quantization characteristics for quantizing the image signal when said image pick-up means is moved.

9. The apparatus according to claim 6, wherein said compression means thins out the image signal of particular frames in the image signal to be transmitted when the amount of coded data obtained from the image signal input by said video input means is large.

10. The apparatus according to claim 6, wherein said compression means includes means for orthogonally transforming the image signal, and quantization means for quantizing the image signal which has been orthogonally transformed by said orthogonal transform means.

11. The apparatus according to claim 6, further comprising audio input means for inputting audio data.

12. The apparatus according to claim 11, further comprising audio input means for coding the audio data.

13. The apparatus according to claim 12, further comprising transmission means for transmitting the image signal which has been compressed by said compression means and the audio data which as been coded by said audio coding means.

14. An apparatus comprising:

image pick-up means for inputting a moving image;

image coding means for coding an image signal from said image pick-up means;

audio input means for inputting an audio;

audio coding means for coding an audio signal input by said audio input means;

output means for comprising a first coded data obtained by said image coding means and a second coded data obtained by said audio coding means and outputting the composite data; and

control means for controlling a ratio of the first coded data and the second coded data in accordance with a change in an image pick-up range of said image pick-up means.

15. The apparatus according to claim 14, wherein said control means increases the ratio of the first coded data in accordance with the change in the image pick-up range.

16. The apparatus according to claim 14, wherein said image coding means includes means for orthogonally transforming the image signal, and quantization means for quantizing the image signal which has been orthogonally transformed by said orthogonal transform means.

17. The apparatus according to claim 14, wherein said output means comprises means for outputting the composite data to a communication line.

18. The apparatus according to claim 14, further comprising means for changing the image pick-up range of said image pick-up means.

19. The apparatus according to claim 18, wherein said changing means pans said image pick-up means over the image pick-up range.