TRANSMISSION METHOD, RECEPTION METHOD, TRANSMITTING DEVICE, AND RECEIVING DEVICE

• US 20180310052A1
• Filed: 07/02/2018
• Published: 10/25/2018
• Est. Priority Date: 12/09/2014
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: NISHI, Takahiro, TOMA, Tadamasa
• Granted Patent: US 10,674,203 B2
• Time in Patent Office: Days
• 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 2207/20208 High dynamic range [HDR] image processing
• CPC Class Codes: G06T 5/92 based on global image properties
• CPC Class Codes: G09G 2320/0271 Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
• CPC Class Codes: G09G 2320/0613 The adjustment depending on the type of the information to be displayed
• CPC Class Codes: G09G 2320/0686 with two or more screen areas displaying information with different brightness or colours
• CPC Class Codes: G09G 2340/12 Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
• 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 2370/20 Details of the management of multiple sources of image data
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G09G 5/10 Intensity circuits
• CPC Class Codes: H04N 21/2343 involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements video transcoding H04N19/40; media packet handling at the source H04L65/762
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• 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 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/4402 involving reformatting operations of video signals for household redistribution, storage or real-time display details of conversion of video standards at pixel level H04N7/01; video transcoding H04N19/40; adapting incoming signals to the display format of the display terminal G09G5/005; media handling at the source in data packet switching networks H04L65/764
• CPC Class Codes: H04N 7/0125 one of the standards being a high definition standard

Abstract

A transmission method in the present disclosure includes; obtaining an image and image signal characteristics information indicating one of an opto-electrical transfer function (OETF) or an electro-optical transfer function (EOTF) as image signal characteristics of the image; and transmitting a signal including the image and the image signal characteristics information. According to the transmission method in the present disclosure, a receiving device that received a high dynamic range (HDR) image and a standard dynamic range (SDR) image transmitted through broadcasting or the like can display these images appropriately.

Claims

1. A transmission method, comprising:

obtaining an image and image signal characteristics information indicating one of an opto-electrical transfer function (OETF) or an electro-optical transfer function (EOTF) as image signal characteristics of the image; and

transmitting a signal including the image and the image signal characteristics information.

2. The transmission method according to claim 1,

wherein in the obtaining of the image signal characteristics information,

when the image is one of text or a graphic, the image signal characteristics information that indicates one of an offset or a scale factor for each code value included in the image, instead of the one of the OETF or the EOTF, is obtained.

3. The transmission method according to claim 1,

wherein the image is an image for data broadcasting, and the signal is a data broadcast signal,

in the transmitting of the signal, the data broadcast signal is transmitted through the data broadcasting,

the transmission method further comprises:

obtaining video for basic broadcasting different from the data broadcasting;

converting, when the image signal characteristics of the image for the data broadcasting and image signal characteristics of the video for the basic broadcasting are different, the image signal characteristics of at least one of the image for the data broadcasting and the video for the basic broadcasting to obtain matched image signal characteristics of the image for the data broadcasting and the video for the basic broadcasting; and

transmitting, through the basic broadcasting, a basic broadcast signal including the video for the basic broadcasting and image signal characteristics information indicating the matched image signal characteristics, and

the image signal characteristics information included in the data broadcast signal indicates one of the OETF or the EOTF as the matched image signal characteristics.

4. The transmission method according to claim 3,

wherein the video for the basic broadcasting is one of a primary video, a secondary video, or a caption corresponding to the primary video.

5. The transmission method according to claim 1,

wherein the image signal characteristics information indicates one of the OETF or the EOTF and at least one of a dynamic range, a color gamut, and a white point as the image signal characteristics.

6. A reception method, comprising:

receiving a first image and first image signal characteristics information indicating image signal characteristics of the first image;

receiving a second image and second image signal characteristics information indicating image signal characteristics of the second image;

converting, when the first image signal characteristics information and the second image signal characteristics information are different, the image signal characteristics of at least one of the first image and the second image to obtain matched image signal characteristics of the first image and the second image; and

simultaneously displaying the first image and the second image having the matched image signal characteristics,

wherein the first image signal characteristics information indicates one of an opto-electrical transfer function (OETF) or an electro-optical transfer function (EOTF) as the image signal characteristics of an image corresponding to one of a first dynamic range or a second dynamic range that is wider than the first dynamic range, and

the second image signal characteristics information indicates one of the OETF or EOTF as the image signal characteristics of an image corresponding to the other of the first dynamic range and the second dynamic range.

7. The reception method according to claim 6,

wherein each of the first image signal characteristics information and the second image signal characteristics information indicates at least one of an opto-electrical transfer function (OETF), an electro-optical transfer function (EOTF), a dynamic range, a color gamut, and a white point as the image signal characteristics.

8. The reception method according to claim 6, further comprising:

when, while the first image and the second image are being displayed simultaneously, only the image signal characteristics indicated in the second image signal characteristics information among the first image signal characteristics information and the second image signal characteristics information that are being received switch,

converting the image signal characteristics of the second image after the switch or stopping conversion that is being performed on the image signal characteristics of the second image before the switch, to obtain matched image signal characteristics of the first image and the second image; and

simultaneously displaying the first image and the second image having the matched image signal characteristics after the conversion of the image signal characteristics of the second image is performed or stopped.

9. The reception method according to claim 6,

wherein in the receiving of the first image and the first image signal characteristics information,

the first image and the first image signal characteristics information transmitted through data broadcasting are received, and

in the receiving of the second image and the second image signal characteristics information,

the second image and the second image signal characteristics information transmitted through basic broadcasting different from the data broadcasting are received.

10. The reception method according to claim 6,

wherein in the receiving of the first image and the first image signal characteristics information,

the first image and the first image signal characteristics information transmitted through communication via a communication network are received, and

in the receiving of the second image and the second image signal characteristics information,

the second image and the second image signal characteristics information transmitted through broadcasting are received.

11. A transmitting device, comprising:

an obtainer which obtains an image and image signal characteristics information indicating one of an opto-electrical transfer function (OETF) or an electro-optical transfer function (EOTF) as image signal characteristics of the image; and

a transmitter which transmits a signal including the image and the image signal characteristics information.

12. A receiving device, comprising:

a first receiver which receives a first image and first image signal characteristics information indicating image signal characteristics of the first image;

a second receiver which receives a second image and second image signal characteristics information indicating image signal characteristics of the second image;

a converter which, when the first image signal characteristics information and the second image signal characteristics information are different, converts the image signal characteristics of at least one of the first image and the second image to obtain matched image signal characteristics of the first image and the second image; and

a display which simultaneously displays the first image and the second image having the matched image signal characteristics.