Image signal processing apparatus and recording/reproducing apparatus

• US 5,926,212 A
• Filed: 07/10/1998
• Issued: 07/20/1999
• Est. Priority Date: 08/30/1995
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kondo, Tetsujiro
• Primary Examiner(s): Tung, Bryan
• Assistant Examiner(s): DIEP, NHON THANH
• Application Number:
  US09/113,329
• Time in Patent Office: 375 Days
• Field of Search: 348/208, 348/699, 348/700, 396/52, 396/53, 396/54, 382/103, 382/241, 382/243
• US Class Current: 348/207.99
• CPC Class Codes: H04N 19/527 Global motion vector estimation
• CPC Class Codes: H04N 19/98 Adaptive-dynamic-range coding [ADRC]
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/6811 based on the image signal
• CPC Class Codes: H04N 23/683 performed by a processor, e.g. controlling the readout of an image memory

Abstract

An interframe difference Pij and a motion vector Vhv are supplied to a camera shake detecting circuit from a motion vector detecting circuit. A camera shake detecting circuit integrates the interframe difference and forms an evaluation value ΣPhv. When all blocks of one picture plane satisfy (Vhv<TH1 and ΣPhv>TH2) for TH1 and TH2, the camera shake detecting circuit detects a camera shake. The motion vector of each block is divided into macroblocks and converted into a motion vector of each macroblock. A camera shake motion vector of the whole picture plane is formed from the motion vector of each macroblock. A correction signal is formed from the detected camera shake motion vector. A camera shake correcting process is executed by the correction signal.

Claims

1. An image signal recording apparatus having functions for

dividing image data of one picture plane into a plurality of blocks,

detecting a motion vector corresponding to a position of the block which most coincides from the image data which is one or a few frames before with respect to each block, and

compressing the image data by using said motion vector, comprising:

means for detecting the motion vector of each block;

means for detecting a camera shake motion vector from the motion vector of each of said blocks;

means for performing a motion compensation by said motion vector; and

means for executing a compressing process by input image data and the image data which was motion compensated,

wherein said camera shake motion vector is recorded together with said compressed image signal.

2. An apparatus according to claim 1, wherein said motion vector detecting means comprises:

input image information memory means to which present image data is inputted;

first comparison image information memory means in which the image data of one or a few frames before has been accumulated;

second comparison image information memory means in which background image data existing in a plurality of frames has been stored;

first means for detecting the motion vector by said present image data and said previous image data;

second means for detecting the motion vector by said present image data and said background image data; and

means for selecting the motion vector having smaller error data in said two detected motion vectors and for outputting said motion vector together with a memory instruction flag indicative of either one of the first and second comparison image information memory means corresponding to said selected motion vector.

3. An image signal recording apparatus having a functions for

dividing image data of one picture plane into a plurality of blocks,

forming an evaluation value table based on a difference between the present image data and the image data of the block which is one or a few frames before every pixel with respect to each block,

detecting coordinates of a minimum value in said evaluation value table,

detecting a motion vector on the basis of said coordinates, and

compressing the image data by using said motion vector, comprising:

means for detecting a camera shake motion vector from said evaluation value table and said motion vector;

means for performing a motion compensation by said motion vector; and

means for executing a compressing process by said input image data and the image data which was motion compensated,

and wherein said camera shake motion vector is recorded together with said compressed image signal.

4. An image signal reproducing apparatus for reproducing the image data recorded by the image signal recording apparatus according to claim 3, comprising:

means for separating a reproduction signal into said compressed image data and said camera shake motion vector;

decoding means for decoding said compressed image data; and

means to which the decoded image signal from said decoding means is supplied and which executes the camera shake correction by said camera shake motion vector.

5. An image signal reproducing apparatus for

dividing image data of one picture plane into a plurality of blocks,

detecting a motion vector corresponding to a position of the block which most coincides from the image data which is one or a few frames before with respect to each block,

compressing the image data by using said motion vector,

detecting a camera shake motion vector from said motion vector,

performing a motion compensation by said motion vector,

executing a compressing process by input image data and the image data which was motion compensated, and

reproducing a recording medium on which said camera shake motion vector has been recorded together with said compressed image signal and said motion vector, comprising:

means for separating a reproduction signal into said compressed image signal, said motion vector, and said camera shake motion vector;

decoding means for decoding said compressed image data by using said motion vector; and

means to which a decoded image signal from said decoding means is supplied and which executes a camera shake correction by said camera shake motion vector.

6. An apparatus according to claim 5, further having:

first image information memory means to which said decoded image data to be subjected to the camera shake correction is inputted;

second image information memory means in which peripheral image data of a frame in said decoded image has been accumulated; and

selecting means for selecting one of the image data outputted from said first and second image information memory means in accordance with said camera shake motion vector.

7. An image signal reproducing apparatus for reproducing the image data recorded by the image signal processing apparatus according to claim 5, wherein

said decoding means is constructed by first image information memory means in which the image data of one or a few frames before has been stored,

second image information memory means in which background image data existing in a plurality of frames has been accumulated, and

means for selecting either one of said first and second image information memory means in accordance with said image memory instruction flag and executing the motion vector correction.

8. An apparatus according to claim 7, wherein said camera shake correcting means selects and outputs

the decoded image data to be subjected to the camera shake correction and

the background image data which is obtained from said second image information memory means

in accordance with said camera shake motion vector.

9. An image signal recording method having functions for

dividing image data of one picture plane into a plurality of blocks,

detecting a motion vector corresponding to a position of the block which most coincides from the image data of one or a few frames before with respect to each block, and

compressing the image data by using said motion vector, comprising the steps of:

detecting the motion vector of each block;

detecting a camera shake motion vector from the motion vector of each of said blocks;

performing a motion compensation by said motion vector; and

executing a compressing process by input image data and the motion compensated image data,

wherein said camera shake motion vector is recorded together with said compressed image signal.

10. An image signal reproducing method of

dividing image data of one picture plane into a plurality of blocks;

detecting a motion vector corresponding to a position of the block which most coincides from the image data of one or a few frames before with respect to each block,

compressing the image data by using said motion vector,

detecting a camera shake motion vector from said motion vector,

performing a motion compensation by said motion vector,

executing a compressing process by input image data and the motion compensated image data, and

reproducing a recording medium on which said camera shake motion vector has been recorded together with said compressed image signal, comprising the steps of;

separating said compressed image signal and said camera shake motion vector from a reproduction signal;

decoding said compressed image data; and

supplying the decoded image signal from said decoding step and executing a camera shake correction by said camera shake motion vector.