Method and apparatus for transmitting and receiving HDR image and SDR image video signals

• US 10,051,319 B2
• Filed: 06/07/2017
• Issued: 08/14/2018
• 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
• Primary Examiner(s): Asanbayev, Oleg
• Application Number:
  US15/616,447
• Publication Number:
  US 20170311034A1
• Time in Patent Office: 433 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, wherein the image is an image for data broadcasting, and the signal is a data broadcast signal;

obtaining video for basic broadcasting different from the data broadcasting and image signal characteristics information of the video;

determining, that the image signal characteristics information of the image for the data broadcasting and the image signal characteristics information of the video for the basic broadcasting are different;

converting, based on the determining that the image signal characteristics information of the image for the data broadcasting and image signal characteristics information of the video for the basic broadcasting are determined to be different, at least one of the image for the data broadcasting and the video for the basic broadcasting to obtain the image for the data broadcasting and the video for the basic broadcasting having matched image signal characteristics; 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;

wherein 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, and

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

2. The transmission method according to claim 1, further

comprising:

determining whether the image is a text or a graphic; and

obtaining, based on the determination that the image is the text or the graphic, the image signal characteristics information that indicates one of an offset or a scale factor for each code value included in the image.

3. 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.

4. 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;

determining that the first image signal characteristics information and the second image signal characteristics information are different;

converting, based on the determining that the first image signal characteristics information and the second image signal characteristics information are determined to be different, at least one of the first image and the second image to obtain the first image and the second image having matched image signal characteristics

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

while the first image and the second image are being displayed simultaneously, determining that the second image signal characteristics have changed, and based on the determining that the second image signal characteristics have changed, converting the second image to obtain the first image and the second image having matched image signal characteristics; and

simultaneously displaying the first image and the second image having the match image signal characteristics after the conversion of the second image is performed;

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.

5. The reception method according to claim 4,

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.

6. The reception method according to claim 4,

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.

7. A transmitting device, comprising:

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

obtains video for basic broadcasting different from the data broadcasting and image signal characteristics information of the video; and

determines whether the image signal characteristics information of the image for the data broadcasting and the image signal characteristics information of the video for the basic broadcasting are different,

converts, if the image signal characteristics information of the image for the data broadcasting and image signal characteristics information of the video for the basic broadcasting are determined to be different, at least one of the image for the data broadcasting and the video for the basic broadcasting to obtain the image for the data broadcasting and the video for the basic broadcasting having matched image signal characteristics; and

a transmitter which transmits, 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;

wherein 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, and

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

8. 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 processor which;

determines whether the first image signal characteristics information and the second image signal characteristics information are different;

converts, if the first image signal characteristics information and the second image signal characteristics information are determined to be different, at least one of the first image and the second image to obtain the first image and the second image having matched image signal characteristics; and

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

wherein while the first image and the second image are being displayed simultaneously, the processor determines whether the second image signal characteristics have changed, and if the second image signal characteristics are determined to have changed, the processor converts the second image to obtain the first image and the second image having matched image signal characteristics,

wherein the display simultaneously displays the first image and the second image having the match image signal characteristics after the conversion of the second image is performed, and

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.