# US 9,521,396 B2 · Stereoscopic video recording method, stereoscopic video recording medium, stereoscopic video reproducing method, stereoscopic video recording apparatus, and stereoscopic video reproducing apparatus

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- Number: US 9,521,396 B2
- Document ID: US9521396B2
- Status: Granted
- Kind: B2
- Application number: 14/850,370
- Filed: 2015-09-10
- Published: 2016-01-07
- Granted: 2016-12-13
- Earliest claimed: 2007-11-29
- Assignees: Mitsubishi Electric Corporation
- Applicants: Mitsubishi Electric Corporation
- Inventors: Masato Nagasawa; Keiji Hatanaka; Kazuhiro Kurisaki
- Web page: https://patentgrep.com/patent/US9521396B2

## CPC

- H04N 13/189: Recording image signals; Reproducing recorded image signals
- G11B 7/00736: {Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information (sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082)}
- G11B 7/0079: {Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas}
- G11B 20/10527: {Audio or video recording; Data buffering arrangements (G11B20/12 - G11B20/18 take precedence)}
- H04N 13/144: for flicker reduction
- H04N 13/161: Encoding, multiplexing or demultiplexing different image signal components (for multi-view video sequence encoding H04N19/597)
- H04N 13/183: On-screen display [OSD] information, e.g. subtitles or menus
- H04N 13/243: using three or more two-dimensional [2D] image sensors
- H04N 13/356: having separate monoscopic and stereoscopic modes
- H04N 13/359: Switching between monoscopic and stereoscopic modes
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
- H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence)
- H04N 19/597: specially adapted for multi-view video sequence encoding
- H04N 19/61: in combination with predictive coding
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- G11B 2020/10611: {3D video data}
- G11B 2220/2537: Optical discs
- H04N 13/156: Mixing image signals
- H04N 13/194: Transmission of image signals
- H04N 13/239: using two two-dimensional [2D] image sensors having a relative position equal to or related to the interocular distance (H04N13/243 takes precedence)
- H04N 13/334: using spectral multiplexing
- H04N 13/337: using polarisation multiplexing
- H04N 13/341: using temporal multiplexing
- H04N 13/361: Reproducing mixed stereoscopic images; Reproducing mixed monoscopic and stereoscopic images, e.g. a stereoscopic image overlay window on a monoscopic image background
- H04N 2213/002: Eyestrain reduction by processing stereoscopic signals or controlling stereoscopic devices
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

The present invention is for more optimally performing recording and reproduction of stereoscopic video. In the present invention, parallax information is utilized to store, in a recording medium, stereoscopic video including left-eye images and right-eye images. Particularly, for video content that contains stereoscopic images, information is obtained regarding the amount of variation in parallactic angle having a given or larger value, a variation time that the variation in parallactic angle takes, and the number of times that the variation in parallactic angle occurs. An evaluation value is calculated that corresponds to the degree of eye fatigue on the basis of the amount of variation, the variation time, and the number of times of the variation. According to the present invention, the video content is encoded in such a manner that the evaluation value is within a given range, and then recorded in the recording medium.

## Claims

### Claim 1

A stereoscopic video reproducing method using left-eye images and right-eye images comprising:
decoding a primary digital image block for a primary image;
decoding a secondary digital image block for a secondary image; and
reproducing a stereoscopic image with said decoded primary and secondary images,
wherein said primary image, which is used for reproducing two dimensional image, is used as one of a left-eye image and a right-eye image according to a data flag indicating whether said primary image is used as one of a left-eye image and a right-eye image,
wherein said secondary image is used as the one of the left-eye image and the right-eye image for which said primary image is not used, and
wherein said secondary image is dependent on image information in said primary image in such manner that said secondary digital image block is derived from said primary digital image block.

### Claim 2

A stereoscopic video reproducing apparatus using left-eye images and right-eye images comprising:
a decoder which decodes a primary digital image block for a primary image, and which decodes a secondary digital image block for a secondary image; and
a reproducer which reproduces a stereoscopic image with said decoded primary and secondary images,
wherein said primary image, which is used for reproducing two dimensional image, is used as one of a left-eye image and a right-eye image according to a data flag indicating whether said primary image is used as one of a left-eye image and a right-eye image,
wherein said secondary image is used as the one of the left-eye image and the right-eye image for which said primary image is not used, and
wherein said secondary image is dependent on image information in said primary image in such manner that said secondary digital image block is derived from said primary digital image block.

### Claim 3

An optical disc on which is recorded image data used for reproducing a stereoscopic video comprising:
a primary digital image block for a primary image used as one of a left-eye image and a right-eye image when a stereoscopic video is reproduced, wherein said primary image is used for reproducing two dimensional image;
a secondary digital image block for a secondary image used as the one of said left-eye image and said right-eye image for which said primary image is not used when said stereoscopic video is reproduced; and
a data flag which indicates whether said primary image is a left-eye image or a right-eye image,
wherein said secondary image is dependent on image information in said primary image in such manner that said secondary digital image block is derived from said primary digital image block.