Video display method using visible light communication image including stripe patterns having different pitches

• US 9,247,180 B2
• Filed: 11/22/2013
• Issued: 01/26/2016
• Est. Priority Date: 12/27/2012
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Inventors: Oshima, Mitsuaki, Aoyama, Hideki, Nakanishi, Koji, Aoto, Koji, Maeda, Toshiyuki, Shiokawa, Akira, Ueki, Akihiro, Suzuki, Takashi
• Primary Examiner(s): Martello, Edward
• Application Number:
  US14/087,707
• Publication Number:
  US 20140184914A1
• Time in Patent Office: 795 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: G06T 1/0028 Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
• CPC Class Codes: G06T 1/0085 Time domain based watermarking, e.g. watermarks spread over several images
• CPC Class Codes: G09G 2310/024 Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
• CPC Class Codes: G09G 2320/0261 in the context of movement of objects on the screen or movement of the observer relative to the screen
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2340/125 wherein one of the images is motion video
• CPC Class Codes: G09G 2370/022 Centralised management of display operation, e.g. in a server instead of locally
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
• CPC Class Codes: G09G 2370/16 Use of wireless transmission of display information
• CPC Class Codes: G09G 2370/18 Use of optical transmission of display information
• CPC Class Codes: G09G 2370/20 Details of the management of multiple sources of image data
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 5/026 Control of mixing and/or overlay of colours in general G09G5/022 and G09G5/024 take precedence
• CPC Class Codes: G09G 5/363 Graphics controllers
• CPC Class Codes: G09G 5/37 Details of the operation on graphic patterns G09G5/38 takes precedence
• CPC Class Codes: H04N 21/2547 Third Party Billing, e.g. billing of advertiser
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/41415 involving a public display, viewable by several users in a public space outside their home, e.g. movie theatre, information kiosk
• CPC Class Codes: H04N 21/4223 Cameras H04N23/00 takes precedence
• CPC Class Codes: H04N 21/4318 : by altering the content in the rendering process, e.g. blanking, blurring or masking an image region image enhancement or restoration in general G06T5/00
• CPC Class Codes: H04N 21/43637 : involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 21/6175 : involving transmission via Internet broadcast-related systems characterised by the transmission system being the Internet H04H60/82
• CPC Class Codes: H04N 21/654 : Transmission by server directed to the client
• CPC Class Codes: H04N 21/6581 : Reference data, e.g. a movie identifier for ordering a movie or a product identifier in a home shopping application
• CPC Class Codes: H04N 21/8133 : specifically related to the content, e.g. biography of the actors in a movie, detailed information about an article seen in a video program
• CPC Class Codes: H04N 21/8352 : involving content or source identification data, e.g. Unique Material Identifier [UMID]
• CPC Class Codes: H04N 21/8358 : involving watermark protecting executable software by watermarking G06F21/16; image watermarking in general G06T1/0021; watermarks inserted in still images for transmission purposes H04N1/32144; inserting watermarks during video coding H04N19/467
• CPC Class Codes: H04N 5/445 : for displaying additional information H04N5/50 takes precedence

Abstract

A video display method in which a visible light communication signal can be appropriately transmitted includes: Step SL 11 of generating a first visible light communication image that is an image having a stripe pattern for visible light communication, by encoding the visible light communication signal; Step SL12 of displaying, in a predetermined frame, an image included in the video signal; and Step SL13 of displaying, in the predetermined frame, the first visible light communication image sequentially thereafter an identification image that is an image having luminance uniformly lower than average luminance of the image that is displayed.

Claims

1. A video display method of displaying, on a per frame basis, an image included in a video signal, the video display method comprising:

generating a first visible light communication image by encoding a visible light communication signal, the first visible light communication image being an image having a stripe pattern for visible light communication;

displaying, in a predetermined frame, the image included in the video signal;

displaying, in the predetermined frame, the first visible light communication image sequentially after an identification image that is an image having luminance uniformly lower than average luminance of the image that is displayed,

switching a pitch of the first visible light communication image to a different pitch and generating a second visible light communication image, wherein pitch is the interval between stripes in the stripe pattern; and

displaying the second visible light communication image after displaying the first visible light communication image, the second visible light communication image being an image having a stripe pattern for visible light communication,

wherein in the displaying of the second visible light communication image, the image has a stripe pattern configured with a different minimum pitch from the stripe pattern of the first visible light communication image.

2. The video display method according to claim 1, further comprising:

capturing the first visible light communication image; and

providing, according to a result of the capturing, an instruction to change the pitch of the stripe pattern,

wherein in the displaying of the second visible light communication image, the second visible light communication image is displayed when the instruction is provided.

3. The video display method according to claim 1, further comprising:

identifying a focal distance for displaying the first visible light communication image on a screen by projection using a projector lens; and

determining, according to the focal distance, a total number of first visible light communication images to be displayed as the first visible light communication image,

wherein in the displaying of the first visible light communication image sequentially after an identification image, the first visible light communication images the total number of which is determined are arranged and displayed on the screen.

4. The video display method according to claim 1, further comprising:

notifying a terminal device which outputs the video signal of identification information indicating that a display apparatus which displays the image included in the video signal is capable of displaying the first visible light communication image.

5. The video display method according to claim 1,

wherein, in a case that a resolution of the second visible light image is lower than the first visible light image, the pitch of the stripe pattern of the second visible light image is larger than the pitch of the stripe pattern of the first visible light image, and in a case that the resolution of the second visible light image is higher than the first visible light image, the pitch of the stripe pattern of the second visible light image is smaller than the pitch of the stripe pattern of the first visible light image.

6. The video display method according to claim 1,

wherein the stripe pattern of the first visible light communication image and the stripe pattern of the second visible light communication image each include a plurality of solid bright lines having a uniform color.

7. The video display method according to claim 5,

wherein the first visible light communication image and the second visible light communication image have a plurality of stripe patterns, a number of the stripe patterns in the first visible light image is different from a number of the stripe patterns in the second visible light image.

8. The video display method according to claim 7,

wherein, in a case that the resolution of the second visible light image is lower than the first visible light image, the number of the stripe patterns of the second visible light image is smaller than the number of the first visible light image, and in a case that the resolution of the second visible light image is higher than the first visible light image, the number of the stripe patterns of the second visible light image is larger than the number of the first visible light image.

9. A video display apparatus, on a per frame basis, an image included in a video signal, the video display apparatus including a processor, the processor executes operations comprising:

generating a first visible light communication image by encoding a visible light communication signal, the first visible light communication image being an image having a stripe pattern for visible light communication;

displaying, in a predetermined frame, the image included in the video signal;

displaying, in the predetermined frame, the first visible light communication image sequentially after an identification image that is an image having luminance uniformly lower than average luminance of the image that is displayed,

switching a pitch of the first visible light communication image to a different pitch and generating a second visible light communication image, wherein pitch is the interval between stripes in the stripe pattern; and

displaying the second visible light communication image after displaying the first visible light communication image, the second visible light communication image being an image having a stripe pattern for visible light communication,

wherein in the displaying of the second visible light communication image, the image has a stripe pattern configured with a different minimum pitch from the stripe pattern of the first visible light communication image.

10. The video display apparatus according to claim 9,

wherein, in a case that a resolution of the second visible light image is lower than the first visible light image, the pitch of the stripe pattern of the second visible light image is larger than the pitch of the stripe pattern of the first visible light image, and in a case that the resolution of the second visible light image is higher than the first visible light image, the pitch of the stripe pattern of the second visible light image is smaller than the pitch of the stripe pattern of the first visible light image.

11. The video display apparatus according to claim 10,

wherein the first visible light communication image and the second visible light communication image have a plurality of the stripe patterns, a number of the stripe patterns in the first visible light image is different from a number of the stripe patterns in the second visible light image.

12. The video display apparatus according to claim 11,

wherein, in a case that the resolution of the second visible light image is lower than the first visible light image, the number of the stripe patterns of the second visible light image is smaller than the number of the first visible light image, and in a case that the resolution of the second visible light image is higher than the first visible light image, the number of the stripe patterns of the second visible light image is larger than the number of the first visible light image.

13. A non-transitory recording medium storing computer software for use in a computer that obtains information from a subject, the computer software causing the computer to execute instructions comprising:

generating a first visible light communication image by encoding a visible light communication signal, the first visible light communication image being an image having a stripe pattern for visible light communication;

displaying, in a predetermined frame, the image included in the video signal;

displaying, in the predetermined frame, the first visible light communication image sequentially after an identification image that is an image having luminance uniformly lower than average luminance of the image that is displayed,

switching a pitch of the first visible light communication image to a different pitch and generating a second visible light communication image wherein, pitch is the interval between stripes in the stripe pattern; and

displaying a second visible light communication image after displaying the first visible light communication image, the second visible light communication image being an image having a stripe pattern for visible light communication,

wherein in the displaying of the second visible light communication image, the image has a stripe pattern configured with a different minimum pitch from the stripe pattern of the first visible light communication image.