JP2017175459A - Signal converter, signal conversion method, television receiver, program, and recording medium - Google Patents

Signal converter, signal conversion method, television receiver, program, and recording medium Download PDF

Info

Publication number
JP2017175459A
JP2017175459A JP2016060858A JP2016060858A JP2017175459A JP 2017175459 A JP2017175459 A JP 2017175459A JP 2016060858 A JP2016060858 A JP 2016060858A JP 2016060858 A JP2016060858 A JP 2016060858A JP 2017175459 A JP2017175459 A JP 2017175459A
Authority
JP
Japan
Prior art keywords
image signal
standard
signal
unit
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2016060858A
Other languages
Japanese (ja)
Inventor
神田 貴史
Takashi Kanda
貴史 神田
Original Assignee
シャープ株式会社
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社, Sharp Corp filed Critical シャープ株式会社
Priority to JP2016060858A priority Critical patent/JP2017175459A/en
Publication of JP2017175459A publication Critical patent/JP2017175459A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/36Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
    • G09G5/39Control of the bit-mapped memory
    • G09G5/391Resolution modifying circuits, e.g. variable screen formats
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4402Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/14Picture signal circuitry for video frequency region
    • H04N5/20Circuitry for controlling amplitude response

Abstract

An image displayed by an image signal that conforms to a standard different from a video standard that conforms to a second video format that has a wider luminance range than the first video format that the display device conforms to is appropriately displayed on the display device. Let
STB (1) acquires standard information indicating a video standard according to a second video format that TV (3) complies with, and an output target image signal is a second video format indicated by the standard information. If the video signal does not conform to the video standard according to the above, the image signal to be output is converted so as to conform to the standard indicated by the standard information, and the converted image signal is output.
[Selection] Figure 1

Description

  The present invention relates to a signal conversion device that converts an image signal, a television receiver including the signal conversion device, a program for causing a computer to function as the signal conversion device, and a recording medium that records the program.

  High dynamic range video (HDR (High Dynamic Range)) having a dynamic range wider than the conventional standard dynamic range (SDR (Standard Dynamic Range)) as one of the technologies for display devices to display images with high brightness and high contrast ) Signal. With HDR signals, high brightness and high contrast can be achieved, so that the power of the video can be increased. Therefore, techniques related to HDR signals have been developed.

  For example, in Patent Document 1, an SDR image sequence is generated from a received HDR image sequence, an SDR image sequence obtained by encoding the generated SDR image sequence is decoded to generate an HDR image sequence, and the generated SDR image sequence and An encoding method for transmitting HDR afterimage data generated from an HDR image sequence to a receiving side is disclosed.

JP 2010-213360 A (published on September 24, 2010)

  Currently, there are a plurality of standards such as SMPTE (Society of Motion Picture and Television Engineers) ST-2084 and ARIB STD-B67 as HDR signal standards (HDR standards). Among such a plurality of HDR standards, EOTF (Electro-Optical Transfer Function) to be adopted is different. Therefore, there is a problem in that an appropriate image is not displayed when an image signal that conforms to an HDR standard different from the HDR standard that the display device conforms to is input. The above-mentioned patent technique 1 does not present a solution to this problem.

  The present invention has been made in view of the above-described problems, and the object thereof is different from the video standard conforming to the second video format having a wider luminance range than the first video format, to which the display device conforms. An object of the present invention is to provide a technique for appropriately displaying an image indicated by an image signal conforming to a standard on the display device.

  In order to solve the above problems, a signal conversion device according to an aspect of the present invention is a signal conversion device that converts an image signal according to a second video format having a wider luminance range than the first video format, An acquisition unit that acquires standard information indicating a standard of one or a plurality of videos according to the second video format, and an image signal to be output correspond to the standard indicated by the standard information. When the determination unit that determines whether or not the image signal is compliant and the determination unit determines that the image signal to be output does not comply with the standard indicated by the standard information, the image signal to be output Are converted so as to comply with the standard indicated by the standard information, and an output unit that outputs the image signal converted by the conversion unit to the display device.

  According to one embodiment of the present invention, an image represented by an image signal that conforms to a standard that is different from a video standard that conforms to a second video format that has a wider luminance range than the first video format that the display device conforms to, It can be displayed appropriately on the display device.

It is a block diagram which shows the principal part structure of the display system which concerns on Embodiment 1 which concerns on Embodiment 1 of this invention. It is a figure which shows the external appearance of TV3 in Embodiment 1 of this invention. It is a flowchart which shows the flow of the process which the display system which concerns on Embodiment 1 which concerns on Embodiment 1 of this invention performs. It is a graph which shows the example of EOTF (Electro-Optical Transfer Function) in Embodiment 1 of the present invention.

Embodiment 1
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

(Display system 100)
FIG. 1 is a block diagram illustrating a main configuration of a display system 100 according to the first embodiment. As shown in FIG. 1, the display system 100 includes a set-top box 1 (signal conversion device, hereinafter sometimes referred to as “STB1”), a television receiver 3 (display device, hereinafter referred to as “TV3”). And the transmitter 7. In the display system 100, the TV 3 outputs an image signal that is output from the transmitter 7 and that conforms to the video standard conforming to the second video format having a wider luminance range than the first video format, via the STB1. The acquired image signal is displayed based on the acquired image signal. In this specification, description will be made using SDR as an example of the first video format and HDR as an example of the second video format. Hereinafter, a video standard according to the second video format may be referred to as an “HDR standard”. The display system 100 is a case where the HDR standard to which the image signal output from the transmitter 7 is compliant is different from the HDR standard to which the TV 3 is compatible (hereinafter also referred to as “TV 3 is compliant”). The TV 3 is a system that can display an appropriate image.

  As an HDR standard, for example, SMPTE (Society of Motion Picture and Television Engineers) ST. There are video formats defined by 2084-2014, CTA (Consumer Technology Association) -861-F, and the like. As an SDR standard, for example, Rec. ITU-R BT. There is a video format standardized by 709.

  In this specification, SMPTE ST-2084 and ARIB STD-B67 are used as examples of the HDR standard, but the present invention is not limited to this.

(STB1)
The STB 1 obtains an image signal to be output that conforms to the HDR standard from the transmitter 7, converts the image signal to be output into an image signal of the HDR standard that the TV 3 supports, and converts the converted image signal. This is a signal conversion device that outputs a signal to the TV 3. Since the “output target image signal” is a signal input to the STB 1, the “output target image signal” may be referred to as an “input image signal”. As shown in FIG. 1, the STB 1 includes a first STB communication unit 12, an STB control unit 14, and a second STB communication unit 16.

  The first STB communication unit 12 is an interface that acquires an input image signal output from the transmitter 7.

  The second STB communication unit 16 is an interface that communicates with the TV 3.

  The STB control unit 14 comprehensively controls each unit of the STB 1. Details of the STB control unit 14 will be described below.

(STB control unit 14)
As shown in FIG. 1, the STB control unit 14 includes a TV information acquisition unit 22 (acquisition unit), an image signal conversion unit 24 (conversion unit, reception unit), a determination unit 26, an image signal output unit 28 (output unit), And a standard information supply unit 29.

  The TV information acquisition unit 22 acquires information related to the TV 3 output from the TV 3. As an example of information related to the TV 3, standard information indicating the HDR standard to which the TV 3 complies is listed.

  The image signal conversion unit 24 converts the input image signal that has been input into an image signal that conforms to an HDR standard different from the HDR standard to which the input image signal conforms.

  The determination unit 26 determines whether the HDR standard indicated by the standard information acquired from the TV 3 matches the HDR standard that the input image signal conforms to.

  The image signal output unit 28 outputs the image signal converted by the image signal conversion unit 24 to the TV 3 as an output signal.

  The standard information supply unit 29 outputs to the TV 3 information indicating the HDR standard that the image signal conversion unit 24 complies with as an output signal.

(TV3)
The TV 3 is a display device that acquires the image signal output from the STB 1 and displays an image based on the image signal. As shown in FIG. 1, the TV 3 includes a TV communication unit 32, a TV control unit 34, a display unit 36, and an operation reception unit 38.

  The TV communication unit 32 is an interface that communicates with the STB 1.

  The display unit 36 is a display device that displays an image indicated by the image signal.

  The operation reception unit 38 receives a user operation and outputs operation information indicating the operation.

  The TV control unit 34 comprehensively controls each unit of the TV 3. Details of the TV control unit 34 will be described below.

(TV control unit 34)
As shown in FIG. 1, the TV control unit 34 includes a TV information management unit 42 and a display control unit 44.

  The TV information management unit 42 manages information related to the TV 3.

  The display control unit 44 causes the display unit 36 to display an image indicated by the acquired image signal.

(Sender 7)
The transmitter 7 can transmit a signal corresponding to each of one or a plurality of HDR standards. The transmitter 7 is realized by, for example, a Blu-ray (registered trademark) disc player, a content server (on-demand server), and a broadcasting station. The transmitter 7 may be realized by a combination of one or a plurality of Blu-ray disc players, a content server, and a broadcasting station.

(Appearance of TV3)
FIG. 2 is a diagram illustrating an appearance of the TV 3 according to the first embodiment. The TV 3 displays a broadcast program indicated by a tuner (not shown). In the present invention, instead of the TV 3 as a display device, the display device 4 (FIG. 2 (a)) without a tuner, personal You may implement | achieve with the computer 5 ((b) of FIG. 2) or the information terminal device 6 ((c) of FIG. 2). Further, the TV 3 may be configured to include each unit configuring the STB 1.

(Processing executed by the display system 100)
FIG. 3 is a flowchart showing a flow of processing executed by the display system 100 according to the first embodiment. Processing executed by the display system 100 will be described with reference to FIG.

(Step S2)
First, the TV information management unit 42 of the TV 3 outputs standard information indicating one or more HDR standards to which the TV 3 complies, to the STB 1 via the TV communication unit 32. A specific example in which the TV information management unit 42 outputs the standard information is a method of outputting the standard information by EDID or CEC. The TV information acquisition unit 22 of the STB 1 acquires the standard information output from the TV 3 via the second STB communication unit 16.

(Step S4)
The image signal conversion unit 24 of the STB 1 acquires an input image signal output from the transmitter 7. Note that the order in which step S2 and step S4 are executed may be reversed.

(Step S6)
The determination unit 26 determines whether or not the standard indicated by the standard information acquired by the TV information acquisition unit 22 in step S2 and the standard based on the input image signal acquired by the image signal conversion unit 24 in step S4 match. judge. In other words, the determination unit 26 determines whether the input image signal acquired by the image signal conversion unit 24 in step S4 conforms to the standard indicated by the standard information acquired by the TV information acquisition unit 22 in step S2. judge. As an example of a method in which the determination unit 26 determines whether the input image signal conforms to the standard indicated by the standard information, the input image signal is HDMI (registered trademark) (High-Definition Multimedia Interface: high definition). In the case of conforming to the (Multimedia Interface) standard, there is a configuration in which the EOTF of “INFO FRAME” included in the input image signal is referred to.

(Step S8)
If it is determined in step S6 that the “standards do not match” (step S6: NO), the image signal conversion unit 24 uses the input image signal acquired by the image signal conversion unit 24 in step S4 as the TV information in step S2. The acquisition unit 22 performs conversion so as to comply with the standard indicated by the standard information acquired. Details of specific processing of the image signal conversion unit 24 will be described later.

(Step S10)
The image signal output unit 28 outputs the image signal converted by the image signal conversion unit 24 to the TV 3 through the second STB communication unit 16 as an output signal after the process of step S8. Further, when it is determined in step S6 that “the standards match” (step S6: YES), the image signal output unit 28 uses the input image signal acquired by the image signal conversion unit 24 in step S4 as an output signal. The data is output to the TV 3 via the second STB communication unit 16. The display control unit 44 of the TV 3 acquires the output signal output from the STB 1 via the TV communication unit 32.

(Step S12)
The display control unit 44 displays the image indicated by the output signal acquired in step S10 on the display unit 36.

(Example 1 of processing of image signal converter 24)
An example of the processing of the image signal conversion unit 24 will be described with reference to FIG. FIG. 4 is a graph showing an example of EOTF (Electro-Optical Transfer Function) in the present embodiment. 4A is a graph showing the EOTF of STD-B67, FIG. 4B is a graph showing the EOTF of ST-2084, and FIG. 4C is a graph showing the EOTF of the SDR signal. As shown in FIG. 4, EOTF and SDR signal EOTF adopted by each HDR standard and SDR standard are different. Therefore, the image signal conversion unit 24 converts the EOTF in the acquired input image signal so that the EOTF conforms to the HDR standard that the TV 3 conforms to.

For example, when the TV 3 conforms to STD-B67 and the image signal conversion unit 24 acquires an input image signal conforming to ST-2084, the image signal conversion unit 24 sets the display luminance to 100 cd / m in the input image signal. There is a configuration in which the gradation value specified in 2 is converted to a gradation value corresponding to 0.5 when the maximum gradation value is 1.

As another example, when the TV 3 conforms to ST-2084 and the image signal converter 24 acquires an input image signal conforming to STD-B67, the image signal converter 24 uses the maximum gradation value in the input image signal. A configuration in which the gradation value corresponding to 0.5 when 1 is 1 is converted to the gradation value specified to 100 cd / m 2 is exemplified.

(Example 2 of processing of image signal converter 24)
Another example of the processing of the image signal conversion unit 24 will be described.

  In each HDR standard, the method of specifying the maximum luminance is also different. For example, the maximum luminance is not specified in STD-B67, but in Dolby Vision (registered trademark) in ST-2084, it is specified as MAX_CLL that dynamically changes from frame to frame. Further, in standards other than Dolby Vision of ST-2084, the maximum luminance in the content represented by the image signal is specified as a fixed value MAX_CLL. Therefore, an example of processing in which the image signal conversion unit 24 converts the image signal so that the maximum luminance output from the TV 3 becomes the maximum luminance set in the acquired input image signal will be described below. In the following description, in order to describe a case where the STB 1 outputs an output signal as an image signal compliant with the HDMI standard, a configuration for setting MAX_CLL of “INFO FRAME” included in the output signal will be described. The configuration is not limited to this.

  For example, when the TV 3 conforms to Dolby Vision and the image signal conversion unit 24 acquires an input image signal conforming to STD-B67, the image signal conversion unit 24 calculates the maximum gradation value for each frame of the input image signal, A configuration that is set as MAX_CLL that dynamically changes may be mentioned.

  As another example of the case where the TV 3 conforms to Dolby Vision and the image signal converter 24 acquires an input image signal conforming to STD-B67, the image signal converter 24 sets an arbitrary value as MAX_CLL. A configuration is mentioned.

  As another example, when the TV 3 conforms to ST-2084 other than Dolby Vision and the image signal conversion unit 24 acquires an input image signal conforming to STD-B67, the image signal conversion unit 24 sets an arbitrary value to MAX_CLL. The configuration to be set as

  As yet another example, when the TV 3 is compliant with Dolby Vision and the image signal converter 24 acquires an input image signal compliant with ST-2084 other than Dolby Vision, the image signal converter 24 There is a configuration in which the adjustment value is set as MAX_CLL that dynamically changes.

  As another example of the case where the TV 3 conforms to the Dolby Vision and the image signal conversion unit 24 acquires an input image signal conforming to ST-2084 other than the Dolby Vision, the image signal conversion unit 24 converts the input image signal into the input image signal. There is a configuration in which included MAX_CLL is set as MAX_CLL as it is.

  Moreover, when TV3 conforms to ST-2084 other than Dolby Vision and the image signal converter 24 conforms to Dolby Vision, the image signal converter 24 may be configured to set an arbitrary value as MAX_CLL.

Examples of arbitrary values include a value of 80% of the luminance that can be output by the display unit 36, 1000 cd / m 2, and the like.

  As described above, in the display system 100 according to the present embodiment, when the STB 1 acquires the standard information from the TV 3 and determines that the image signal to be output does not conform to the standard indicated by the standard information, the output target Are converted so as to conform to the standard indicated by the standard information. Therefore, in the display system 100, an image of an image signal that conforms to an HDR standard different from the HDR standard that the TV 3 conforms to can be appropriately displayed on the TV 3.

[Embodiment 2]
Another embodiment of the present invention will be described. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted. In the present embodiment, a method in which the STB 1 selects an HDR standard suitable for the TV 3 will be described.

(Method 1 for selecting HDR standard)
An example of how the STB 1 selects the HDR standard will be described.

  First, in STB 1, a priority order is determined in advance for each of a plurality of HDR standards. When the TV 3 conforms to a plurality of HDR standards (when the standard information indicates a plurality of HDR standards), the image signal conversion unit 24 has a priority order among the HDR standards conforming to the TV 3 in step S8 described above. The input image signal is converted so as to comply with the high HDR standard.

  In this manner, in STB1, the priority order is determined in advance for each of the plurality of HDR standards, so that STB1 can input video signals more appropriately even when TV3 conforms to the plurality of HDR standards. It can be converted into an HDR standard image signal.

(Method 2 for selecting the HDR standard)
Another example of how the STB 1 selects the HDR standard will be described.

  First, in STB 1, any of a plurality of HDR standards is associated with each of a plurality of image quality settings that can be set on TV 3. In step S2 described above, the TV information management unit 42 of the TV 3 further outputs image quality setting information indicating the image quality setting set in the TV 3 in addition to the standard information. In step S <b> 8 described above, the image signal conversion unit 24 converts the input image signal so as to comply with the HDR standard associated with the image quality setting indicated by the image quality setting information acquired from the TV 3.

  Thus, in STB1, by associating one of a plurality of HDR standards with each of a plurality of image quality settings that can be set on TV3, STB1 is suitable for the image quality settings set on TV3. It can be converted into an HDR standard image signal.

(Method 3 for selecting the HDR standard)
Still another example of how the STB 1 selects the HDR standard will be described.

  First, in STB1, one of a plurality of HDR standards is associated with each of the content genres represented by the input image signal. Then, in step S8 described above, the image signal conversion unit 24 converts the input image signal so as to comply with the HDR standard associated with the genre of the content represented by the input image signal.

  As described above, in STB1, by associating any of a plurality of HDR standards with each of the content genres represented by the input image signal, STB1 converts the input image signal into the content represented by the input image signal. The image signal can be converted into a suitable HDR standard image signal.

(Method 4 for selecting HDR standard)
Still another example of how the STB 1 selects the HDR standard will be described.

  First, the standard information supply unit 29 of the STB 1 supplies information indicating a plurality of HDR standards to which the STB 1 complies as an output signal to the TV 3 via the second STB communication unit 16.

  When the display control unit 44 of the TV 3 acquires the information, the display control unit 44 causes the display unit 36 to display a screen that allows the user to select one of a plurality of HDR standards indicated by the information. When the operation reception unit 38 receives an operation signal indicating that any of the plurality of HDR standards is selected, the TV information management unit 42 displays selection information indicating which HDR standard has been selected as the TV communication unit. 32 via the output.

  When the TV information acquisition unit 22 of the STB 1 acquires the selection information via the second STB communication unit 16, the image signal conversion unit 24 inputs the input image so that the image signal of the HDR standard signal indicated by the selection information is obtained. Convert the signal.

  As described above, the STB 1 supplies the TV 3 with information indicating a plurality of HDR standards that the STB 1 complies with as an output signal. Then, the STB 1 acquires selection information indicating which HDR standard is selected from the TV 3. With this configuration, the STB 1 can convert the input image signal into an HDR standard image signal desired by the user.

(Example when TV3 does not comply with the HDR standard)
An example where the TV 3 does not comply with the HDR standard will be described.

  When the standard information of the TV 3 acquired by the TV information acquisition unit 22 of the STB 1 does not conform to any HDR standard, the image signal conversion unit 24 converts the input image signal into an image signal of a dynamic range video narrower than HDR. Conversion to a certain SDR image signal.

  Thus, the STB 1 converts the input image signal into an SDR image signal when the TV 3 does not comply with any of the HDR standards. Therefore, the STB 1 can convert an input image signal that conforms to the HDR standard into a displayable image signal even for the TV 3 that does not conform to any of the HDR standards.

[Embodiment 3]
Another embodiment of the present invention will be described. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  In the above-described embodiment, the configuration in which the STB 1 acquires an input image signal corresponding to one HDR standard has been described. In the present embodiment, the configuration in which the STB 1 acquires an input image signal corresponding to each of a plurality of HDR standards. Will be described.

  In the present embodiment, the HDR standard that the TV 3 complies with is the HDR standard 2, and the STB 1 can convert the input image signal that conforms to the HDR standard 1 into the HDR standard 3, and the input image signal that conforms to the HDR standard 4 Will be described by taking as an example the case where can be converted to HDR standard 2.

  First, in step S2, the TV information management unit 42 of the TV 3 outputs standard information indicating HDR2 to the STB 1 via the TV communication unit 32. The TV information acquisition unit 22 of the STB 1 acquires the standard information output from the TV 3 via the second STB communication unit 16.

  Subsequently, in step S4, the image signal conversion unit 24 acquires an input image signal conforming to the HDR standard 1. In this case, in step S6, the determination unit 26 determines the standard indicated by the standard information acquired by the TV information acquisition unit 22 in step S2 and the standard based on the input image signal acquired by the image signal conversion unit 24 in step S4. , It is determined that they do not match.

  In this case, in step S8, the image signal conversion unit 24 attempts to convert the input image signal compliant with the HDR standard 1 into an image signal compliant with the HDR standard 2 compliant with the TV 3, but the image signal according to the present embodiment. The converter 24 cannot convert an image signal compliant with the HDR standard 1 into an image signal compliant with the HDR standard 2. Therefore, the image signal conversion unit 24 acquires an input image signal compliant with the HDR standard 4 from the transmitter 7. As an example of a method in which the image signal conversion unit 24 acquires an input image signal compliant with the HDR standard 4 from the transmitter 7, the image signal conversion unit 24 inputs an input image signal compliant with the HDR standard 4 to the transmitter 7. The required configuration is listed.

  As described above, when the STB 1 in the present embodiment acquires a signal that cannot be converted into the HDR standard that the TV 3 complies with, the TV 3 complies with the transmitter 7 that can transmit a signal corresponding to each of the plurality of HDR standards. Obtain a signal that can be converted to the HDR standard. Therefore, the STB 1 can acquire an appropriate input image signal according to the HDR standard that the TV 3 complies with.

[Example of software implementation]
The control block (particularly the STB control unit 14) of the STB 1 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or realized by software using a CPU (Central Processing Unit). May be.

  In the latter case, the STB 1 is a CPU that executes instructions of a program that is software that realizes each function, a ROM (Read Only Memory) or a storage device in which the program and various data are recorded so as to be readable by a computer (or CPU). (These are referred to as “recording media”), and a RAM (Random Access Memory) for expanding the program. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal in which the program is embodied by electronic transmission and embedded in a carrier wave.

[Summary]
A signal conversion device (STB1) according to aspect 1 of the present invention is a signal conversion device that converts an image signal in accordance with a second video format having a wider luminance range than the first video format, from the display device (TV3). An acquisition unit (TV information acquisition unit) that acquires standard information indicating a standard of one or a plurality of videos according to the second video format, and an output target image signal includes the standard information When the determination unit (26) that determines whether or not it conforms to the standard indicated, and the determination unit determines that the image signal to be output is not compliant with the standard indicated by the standard information, A conversion unit (image signal conversion unit 24) that converts the output image signal so as to comply with the standard indicated by the standard information, and the image signal converted by the conversion unit is displayed in the table above. Comprising an output unit that outputs to the device (image signal output unit), a.

  According to the above configuration, the signal conversion device according to this aspect is compliant with the video standard (hereinafter referred to as the HDR standard) conforming to the second video format with a wide luminance range, which the display device supports, and the image signal to be output. When the HDR standard is different, the image signal to be output is converted to be an HDR standard image signal that the display device conforms to. Therefore, the signal conversion device according to this aspect can appropriately display the image indicated by the image signal conforming to the HDR standard different from the HDR standard conforming to the display device on the display device.

  The signal conversion device according to aspect 2 of the present invention is the signal conversion apparatus according to aspect 1, in which a priority order is predetermined for each of a plurality of video standards according to the second video format, and a plurality of standard information acquired by the acquisition unit. If the information indicates the video standard, the conversion unit determines that the output target image signal conforms to the video standard having a higher priority among the plurality of video standards indicated by the standard information. You may convert so that it may become.

  According to the above configuration, the signal conversion apparatus according to this aspect converts an image signal to be output into a more appropriate HDR standard image signal even when the display apparatus supports a plurality of HDR standards. be able to.

  In the signal conversion device according to aspect 3 of the present invention, in the above aspect 1, any one of a plurality of video standards according to the second video format is associated with each of a plurality of image quality settings that can be set in the display device. The acquisition unit further acquires image quality setting information indicating the image quality setting set in the display device, and the conversion unit acquires the image signal to be output that has been acquired by the acquisition unit. You may convert so that it may become based on the standard of the image | video linked | related with the image quality setting which information shows.

  According to said structure, the signal converter which concerns on this aspect can convert into the image signal of the HDR specification suitable for the image quality setting currently set in the display apparatus.

  In the signal conversion device according to aspect 4 of the present invention, in the aspect 1, any of a plurality of video standards in accordance with the second video format is associated with each of the content genres represented by the image signal to be output. The converting unit may convert the image signal to be output in accordance with a video standard associated with the genre of the content represented by the image signal to be output.

  According to said structure, the signal converter which concerns on this aspect can convert the image signal of output object into the image signal of the HDR specification suitable for the content which the image signal of output object expresses.

  A signal conversion device according to aspect 5 of the present invention is a standard that supplies information indicating a plurality of video standards according to the second video format, which is based on the output signal of the signal conversion device, to the display device according to aspect 1 An information supply unit, wherein the acquisition unit further acquires selection information indicating which video standard according to which second video format is selected, and the conversion unit receives the image signal to be output, You may convert so that it may become an image signal of the standard of a picture which selection information which the above-mentioned acquisition part acquired shows.

  According to said structure, the signal converter which concerns on this aspect can convert the image signal of an output target into the image signal of the HDR specification which the user of a display apparatus desires.

  A signal conversion device according to aspect 6 of the present invention is the signal conversion apparatus according to any one of the above aspects 1 to 5, in which the display device does not comply with any one or more video standards according to the second video format. The conversion unit may convert the image signal to be output into a video image signal conforming to the first video format.

  According to said structure, the signal converter which concerns on this aspect can convert into the image signal which a display apparatus can display, even if it is a case where a display apparatus is not based on either of HDR standards.

  The signal conversion device according to aspect 7 of the present invention provides the signal conversion device according to any one of the above aspects 1 to 6, wherein the output target is transmitted from a transmitter capable of transmitting a signal corresponding to each of a plurality of video standards according to the second video format. A signal that further includes a receiving unit (image signal converting unit 24) that acquires an image signal, and the image signal to be output can be converted by the converting unit into a video standard that conforms to the second video format that the display device conforms to. If not, the receiving unit may acquire a signal that can be converted into a video standard conforming to the second video format with which the display device conforms.

  According to said structure, the signal converter which concerns on this aspect can acquire the image signal of an appropriate output target according to the HDR specification with which a display apparatus is based.

  The signal conversion device according to aspect 8 of the present invention functions as a set-top box in any of the above aspects 1 to 7.

  According to said structure, the set top box which functions as a signal converter concerning any one of the said aspects 1-7 is realizable.

  The television receiver which concerns on aspect 9 of this invention is equipped with the signal converter device in any one of the said aspects 1-7.

  According to said structure, the television receiver which functions as a signal converter concerning any one of the said aspects 1-7 is realizable.

  The signal conversion device according to each aspect of the present invention may be realized by a computer. In this case, the signal conversion device is operated on each computer by causing the computer to operate as each unit (software element) included in the signal conversion device. Also included in the scope of the present invention are a program of a signal conversion device to be realized and a computer-readable recording medium on which the program is recorded.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

1 Set-top box (STB, signal converter)
3 Television receiver (TV, display device)
7 Transmitter 22 TV information acquisition unit (acquisition unit)
24 Image signal converter (converter, receiver)
26 determination unit 28 image signal output unit (output unit)
34 TV control unit 42 TV information management unit 44 Display control unit 100 Display system

The present invention relates to a signal converter for converting an image signal, a signal conversion method, a television receiver including the signal converter, a program for causing a computer to function as the signal converter, and a recording medium on which the program is recorded. .

  High dynamic range video (HDR (High Dynamic Range)) having a dynamic range wider than the conventional standard dynamic range (SDR (Standard Dynamic Range)) as one of the technologies for display devices to display images with high brightness and high contrast ) Signal. With HDR signals, high brightness and high contrast can be achieved, so that the power of the video can be increased. Therefore, techniques related to HDR signals have been developed.

  For example, in Patent Document 1, an SDR image sequence is generated from a received HDR image sequence, an SDR image sequence obtained by encoding the generated SDR image sequence is decoded to generate an HDR image sequence, and the generated SDR image sequence and An encoding method for transmitting HDR afterimage data generated from an HDR image sequence to a receiving side is disclosed.

JP 2010-213360 A (published on September 24, 2010)

  Currently, there are a plurality of standards such as SMPTE (Society of Motion Picture and Television Engineers) ST-2084 and ARIB STD-B67 as HDR signal standards (HDR standards). Among such a plurality of HDR standards, EOTF (Electro-Optical Transfer Function) to be adopted is different. Therefore, there is a problem in that an appropriate image is not displayed when an image signal that conforms to an HDR standard different from the HDR standard that the display device conforms to is input. The above-mentioned patent technique 1 does not present a solution to this problem.

  The present invention has been made in view of the above-described problems, and the object thereof is different from the video standard conforming to the second video format having a wider luminance range than the first video format, to which the display device conforms. An object of the present invention is to provide a technique for appropriately displaying an image indicated by an image signal conforming to a standard on the display device.

  In order to solve the above problems, a signal conversion device according to an aspect of the present invention is a signal conversion device that converts an image signal according to a second video format having a wider luminance range than the first video format, An acquisition unit that acquires standard information indicating a standard of one or a plurality of videos according to the second video format, and an image signal to be output correspond to the standard indicated by the standard information. When the determination unit that determines whether or not the image signal is compliant and the determination unit determines that the image signal to be output does not comply with the standard indicated by the standard information, the image signal to be output Are converted so as to comply with the standard indicated by the standard information, and an output unit that outputs the image signal converted by the conversion unit to the display device.

  In order to solve the above problem, a signal conversion method according to an aspect of the present invention is a signal conversion method for converting an image signal according to a second video format having a wider luminance range than the first video format. From the display device, the standard information indicating the standard of one or a plurality of videos according to the second video format corresponding to the display device is acquired, and the image signal to be output conforms to the standard indicated by the standard information. If not, the image signal to be output is converted so as to comply with the standard indicated by the standard information, and the converted image signal is output to the display device.

  According to one embodiment of the present invention, an image represented by an image signal that conforms to a standard that is different from a video standard that conforms to a second video format that has a wider luminance range than the first video format that the display device conforms to, It can be displayed appropriately on the display device.

It is a block diagram which shows the principal part structure of the display system which concerns on Embodiment 1 which concerns on Embodiment 1 of this invention. It is a figure which shows the external appearance of TV3 in Embodiment 1 of this invention. It is a flowchart which shows the flow of the process which the display system which concerns on Embodiment 1 which concerns on Embodiment 1 of this invention performs. It is a graph which shows the example of EOTF (Electro-Optical Transfer Function) in Embodiment 1 of the present invention.

Embodiment 1
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

(Display system 100)
FIG. 1 is a block diagram illustrating a main configuration of a display system 100 according to the first embodiment. As shown in FIG. 1, the display system 100 includes a set-top box 1 (signal conversion device, hereinafter sometimes referred to as “STB1”), a television receiver 3 (display device, hereinafter referred to as “TV3”). And the transmitter 7. In the display system 100, the TV 3 outputs an image signal that is output from the transmitter 7 and that conforms to the video standard conforming to the second video format having a wider luminance range than the first video format, via the STB1. The acquired image signal is displayed based on the acquired image signal. In this specification, description will be made using SDR as an example of the first video format and HDR as an example of the second video format. Hereinafter, a video standard according to the second video format may be referred to as an “HDR standard”. The display system 100 is a case where the HDR standard to which the image signal output from the transmitter 7 is compliant is different from the HDR standard to which the TV 3 is compatible (hereinafter also referred to as “TV 3 is compliant”). The TV 3 is a system that can display an appropriate image.

  As an HDR standard, for example, SMPTE (Society of Motion Picture and Television Engineers) ST. There are video formats defined by 2084-2014, CTA (Consumer Technology Association) -861-F, and the like. As an SDR standard, for example, Rec. ITU-R BT. There is a video format standardized by 709.

  In this specification, SMPTE ST-2084 and ARIB STD-B67 are used as examples of the HDR standard, but the present invention is not limited to this.

(STB1)
The STB 1 obtains an image signal to be output that conforms to the HDR standard from the transmitter 7, converts the image signal to be output into an image signal of the HDR standard that the TV 3 supports, and converts the converted image signal. This is a signal conversion device that outputs a signal to the TV 3. Since the “output target image signal” is a signal input to the STB 1, the “output target image signal” may be referred to as an “input image signal”. As shown in FIG. 1, the STB 1 includes a first STB communication unit 12, an STB control unit 14, and a second STB communication unit 16.

  The first STB communication unit 12 is an interface that acquires an input image signal output from the transmitter 7.

  The second STB communication unit 16 is an interface that communicates with the TV 3.

  The STB control unit 14 comprehensively controls each unit of the STB 1. Details of the STB control unit 14 will be described below.

(STB control unit 14)
As shown in FIG. 1, the STB control unit 14 includes a TV information acquisition unit 22 (acquisition unit), an image signal conversion unit 24 (conversion unit, reception unit), a determination unit 26, an image signal output unit 28 (output unit), And a standard information supply unit 29.

  The TV information acquisition unit 22 acquires information related to the TV 3 output from the TV 3. As an example of information related to the TV 3, standard information indicating the HDR standard to which the TV 3 complies is listed.

  The image signal conversion unit 24 converts the input image signal that has been input into an image signal that conforms to an HDR standard different from the HDR standard to which the input image signal conforms.

  The determination unit 26 determines whether the HDR standard indicated by the standard information acquired from the TV 3 matches the HDR standard that the input image signal conforms to.

  The image signal output unit 28 outputs the image signal converted by the image signal conversion unit 24 to the TV 3 as an output signal.

  The standard information supply unit 29 outputs to the TV 3 information indicating the HDR standard that the image signal conversion unit 24 complies with as an output signal.

(TV3)
The TV 3 is a display device that acquires the image signal output from the STB 1 and displays an image based on the image signal. As shown in FIG. 1, the TV 3 includes a TV communication unit 32, a TV control unit 34, a display unit 36, and an operation reception unit 38.

  The TV communication unit 32 is an interface that communicates with the STB 1.

  The display unit 36 is a display device that displays an image indicated by the image signal.

  The operation reception unit 38 receives a user operation and outputs operation information indicating the operation.

  The TV control unit 34 comprehensively controls each unit of the TV 3. Details of the TV control unit 34 will be described below.

(TV control unit 34)
As shown in FIG. 1, the TV control unit 34 includes a TV information management unit 42 and a display control unit 44.

  The TV information management unit 42 manages information related to the TV 3.

  The display control unit 44 causes the display unit 36 to display an image indicated by the acquired image signal.

(Sender 7)
The transmitter 7 can transmit a signal corresponding to each of one or a plurality of HDR standards. The transmitter 7 is realized by, for example, a Blu-ray (registered trademark) disc player, a content server (on-demand server), and a broadcasting station. The transmitter 7 may be realized by a combination of one or a plurality of Blu-ray disc players, a content server, and a broadcasting station.

(Appearance of TV3)
FIG. 2 is a diagram illustrating an appearance of the TV 3 according to the first embodiment. The TV 3 displays a broadcast program indicated by a tuner (not shown). In the present invention, instead of the TV 3 as a display device, the display device 4 (FIG. 2 (a)) without a tuner, personal You may implement | achieve with the computer 5 ((b) of FIG. 2) or the information terminal device 6 ((c) of FIG. 2). Further, the TV 3 may be configured to include each unit configuring the STB 1.

(Processing executed by the display system 100)
FIG. 3 is a flowchart showing a flow of processing executed by the display system 100 according to the first embodiment. Processing executed by the display system 100 will be described with reference to FIG.

(Step S2)
First, the TV information management unit 42 of the TV 3 outputs standard information indicating one or more HDR standards to which the TV 3 complies, to the STB 1 via the TV communication unit 32. A specific example in which the TV information management unit 42 outputs the standard information is a method of outputting the standard information by EDID or CEC. The TV information acquisition unit 22 of the STB 1 acquires the standard information output from the TV 3 via the second STB communication unit 16.

(Step S4)
The image signal conversion unit 24 of the STB 1 acquires an input image signal output from the transmitter 7. Note that the order in which step S2 and step S4 are executed may be reversed.

(Step S6)
The determination unit 26 determines whether or not the standard indicated by the standard information acquired by the TV information acquisition unit 22 in step S2 and the standard based on the input image signal acquired by the image signal conversion unit 24 in step S4 match. judge. In other words, the determination unit 26 determines whether the input image signal acquired by the image signal conversion unit 24 in step S4 conforms to the standard indicated by the standard information acquired by the TV information acquisition unit 22 in step S2. judge. As an example of a method in which the determination unit 26 determines whether the input image signal conforms to the standard indicated by the standard information, the input image signal is HDMI (registered trademark) (High-Definition Multimedia Interface: high definition). In the case of conforming to the (Multimedia Interface) standard, there is a configuration in which the EOTF of “INFO FRAME” included in the input image signal is referred to.

(Step S8)
If it is determined in step S6 that the “standards do not match” (step S6: NO), the image signal conversion unit 24 uses the input image signal acquired by the image signal conversion unit 24 in step S4 as the TV information in step S2. The acquisition unit 22 performs conversion so as to comply with the standard indicated by the standard information acquired. Details of specific processing of the image signal conversion unit 24 will be described later.

(Step S10)
The image signal output unit 28 outputs the image signal converted by the image signal conversion unit 24 to the TV 3 through the second STB communication unit 16 as an output signal after the process of step S8. Further, when it is determined in step S6 that “the standards match” (step S6: YES), the image signal output unit 28 uses the input image signal acquired by the image signal conversion unit 24 in step S4 as an output signal. The data is output to the TV 3 via the second STB communication unit 16. The display control unit 44 of the TV 3 acquires the output signal output from the STB 1 via the TV communication unit 32.

(Step S12)
The display control unit 44 displays the image indicated by the output signal acquired in step S10 on the display unit 36.

(Example 1 of processing of image signal converter 24)
An example of the processing of the image signal conversion unit 24 will be described with reference to FIG. FIG. 4 is a graph showing an example of EOTF (Electro-Optical Transfer Function) in the present embodiment. 4A is a graph showing the EOTF of STD-B67, FIG. 4B is a graph showing the EOTF of ST-2084, and FIG. 4C is a graph showing the EOTF of the SDR signal. As shown in FIG. 4, EOTF and SDR signal EOTF adopted by each HDR standard and SDR standard are different. Therefore, the image signal conversion unit 24 converts the EOTF in the acquired input image signal so that the EOTF conforms to the HDR standard that the TV 3 conforms to.

For example, when the TV 3 conforms to STD-B67 and the image signal conversion unit 24 acquires an input image signal conforming to ST-2084, the image signal conversion unit 24 sets the display luminance to 100 cd / m in the input image signal. There is a configuration in which the gradation value specified in 2 is converted to a gradation value corresponding to 0.5 when the maximum gradation value is 1.

As another example, when the TV 3 conforms to ST-2084 and the image signal converter 24 acquires an input image signal conforming to STD-B67, the image signal converter 24 uses the maximum gradation value in the input image signal. A configuration in which the gradation value corresponding to 0.5 when 1 is 1 is converted to the gradation value specified to 100 cd / m 2 is exemplified.

(Example 2 of processing of image signal converter 24)
Another example of the processing of the image signal conversion unit 24 will be described.

  In each HDR standard, the method of specifying the maximum luminance is also different. For example, the maximum luminance is not specified in STD-B67, but in Dolby Vision (registered trademark) in ST-2084, it is specified as MAX_CLL that dynamically changes from frame to frame. Further, in standards other than Dolby Vision of ST-2084, the maximum luminance in the content represented by the image signal is specified as a fixed value MAX_CLL. Therefore, an example of processing in which the image signal conversion unit 24 converts the image signal so that the maximum luminance output from the TV 3 becomes the maximum luminance set in the acquired input image signal will be described below. In the following description, in order to describe a case where the STB 1 outputs an output signal as an image signal compliant with the HDMI standard, a configuration for setting MAX_CLL of “INFO FRAME” included in the output signal will be described. The configuration is not limited to this.

  For example, when the TV 3 conforms to Dolby Vision and the image signal conversion unit 24 acquires an input image signal conforming to STD-B67, the image signal conversion unit 24 calculates the maximum gradation value for each frame of the input image signal, A configuration that is set as MAX_CLL that dynamically changes may be mentioned.

  As another example of the case where the TV 3 conforms to Dolby Vision and the image signal converter 24 acquires an input image signal conforming to STD-B67, the image signal converter 24 sets an arbitrary value as MAX_CLL. A configuration is mentioned.

  As another example, when the TV 3 conforms to ST-2084 other than Dolby Vision and the image signal conversion unit 24 acquires an input image signal conforming to STD-B67, the image signal conversion unit 24 sets an arbitrary value to MAX_CLL. The configuration to be set as

  As yet another example, when the TV 3 is compliant with Dolby Vision and the image signal converter 24 acquires an input image signal compliant with ST-2084 other than Dolby Vision, the image signal converter 24 There is a configuration in which the adjustment value is set as MAX_CLL that dynamically changes.

  As another example of the case where the TV 3 conforms to the Dolby Vision and the image signal conversion unit 24 acquires an input image signal conforming to ST-2084 other than the Dolby Vision, the image signal conversion unit 24 converts the input image signal into the input image signal. There is a configuration in which included MAX_CLL is set as MAX_CLL as it is.

  Moreover, when TV3 conforms to ST-2084 other than Dolby Vision and the image signal converter 24 conforms to Dolby Vision, the image signal converter 24 may be configured to set an arbitrary value as MAX_CLL.

Examples of arbitrary values include a value of 80% of the luminance that can be output by the display unit 36, 1000 cd / m 2, and the like.

  As described above, in the display system 100 according to the present embodiment, when the STB 1 acquires the standard information from the TV 3 and determines that the image signal to be output does not conform to the standard indicated by the standard information, the output target Are converted so as to conform to the standard indicated by the standard information. Therefore, in the display system 100, an image of an image signal that conforms to an HDR standard different from the HDR standard that the TV 3 conforms to can be appropriately displayed on the TV 3.

[Embodiment 2]
Another embodiment of the present invention will be described. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted. In the present embodiment, a method in which the STB 1 selects an HDR standard suitable for the TV 3 will be described.

(Method 1 for selecting HDR standard)
An example of how the STB 1 selects the HDR standard will be described.

  First, in STB 1, a priority order is determined in advance for each of a plurality of HDR standards. When the TV 3 conforms to a plurality of HDR standards (when the standard information indicates a plurality of HDR standards), the image signal conversion unit 24 has a priority order among the HDR standards conforming to the TV 3 in step S8 described above. The input image signal is converted so as to comply with the high HDR standard.

  In this manner, in STB1, the priority order is determined in advance for each of the plurality of HDR standards, so that STB1 can input video signals more appropriately even when TV3 conforms to the plurality of HDR standards. It can be converted into an HDR standard image signal.

(Method 2 for selecting the HDR standard)
Another example of how the STB 1 selects the HDR standard will be described.

  First, in STB 1, any of a plurality of HDR standards is associated with each of a plurality of image quality settings that can be set on TV 3. In step S2 described above, the TV information management unit 42 of the TV 3 further outputs image quality setting information indicating the image quality setting set in the TV 3 in addition to the standard information. In step S <b> 8 described above, the image signal conversion unit 24 converts the input image signal so as to comply with the HDR standard associated with the image quality setting indicated by the image quality setting information acquired from the TV 3.

  Thus, in STB1, by associating one of a plurality of HDR standards with each of a plurality of image quality settings that can be set on TV3, STB1 is suitable for the image quality settings set on TV3. It can be converted into an HDR standard image signal.

(Method 3 for selecting the HDR standard)
Still another example of how the STB 1 selects the HDR standard will be described.

  First, in STB1, one of a plurality of HDR standards is associated with each of the content genres represented by the input image signal. Then, in step S8 described above, the image signal conversion unit 24 converts the input image signal so as to comply with the HDR standard associated with the genre of the content represented by the input image signal.

  As described above, in STB1, by associating any of a plurality of HDR standards with each of the content genres represented by the input image signal, STB1 converts the input image signal into the content represented by the input image signal. The image signal can be converted into a suitable HDR standard image signal.

(Method 4 for selecting HDR standard)
Still another example of how the STB 1 selects the HDR standard will be described.

  First, the standard information supply unit 29 of the STB 1 supplies information indicating a plurality of HDR standards to which the STB 1 complies as an output signal to the TV 3 via the second STB communication unit 16.

  When the display control unit 44 of the TV 3 acquires the information, the display control unit 44 causes the display unit 36 to display a screen that allows the user to select one of a plurality of HDR standards indicated by the information. When the operation reception unit 38 receives an operation signal indicating that any of the plurality of HDR standards is selected, the TV information management unit 42 displays selection information indicating which HDR standard has been selected as the TV communication unit. 32 via the output.

  When the TV information acquisition unit 22 of the STB 1 acquires the selection information via the second STB communication unit 16, the image signal conversion unit 24 inputs the input image so that the image signal of the HDR standard signal indicated by the selection information is obtained. Convert the signal.

  As described above, the STB 1 supplies the TV 3 with information indicating a plurality of HDR standards that the STB 1 complies with as an output signal. Then, the STB 1 acquires selection information indicating which HDR standard is selected from the TV 3. With this configuration, the STB 1 can convert the input image signal into an HDR standard image signal desired by the user.

(Example when TV3 does not comply with the HDR standard)
An example where the TV 3 does not comply with the HDR standard will be described.

  When the standard information of the TV 3 acquired by the TV information acquisition unit 22 of the STB 1 does not conform to any HDR standard, the image signal conversion unit 24 converts the input image signal into an image signal of a dynamic range video narrower than HDR. Conversion to a certain SDR image signal.

  Thus, the STB 1 converts the input image signal into an SDR image signal when the TV 3 does not comply with any of the HDR standards. Therefore, the STB 1 can convert an input image signal that conforms to the HDR standard into a displayable image signal even for the TV 3 that does not conform to any of the HDR standards.

[Embodiment 3]
Another embodiment of the present invention will be described. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  In the above-described embodiment, the configuration in which the STB 1 acquires an input image signal corresponding to one HDR standard has been described. In the present embodiment, the configuration in which the STB 1 acquires an input image signal corresponding to each of a plurality of HDR standards. Will be described.

  In the present embodiment, the HDR standard that the TV 3 complies with is the HDR standard 2, and the STB 1 can convert the input image signal that conforms to the HDR standard 1 into the HDR standard 3, and the input image signal that conforms to the HDR standard 4 Will be described by taking as an example the case where can be converted to HDR standard 2.

  First, in step S2, the TV information management unit 42 of the TV 3 outputs standard information indicating HDR2 to the STB 1 via the TV communication unit 32. The TV information acquisition unit 22 of the STB 1 acquires the standard information output from the TV 3 via the second STB communication unit 16.

  Subsequently, in step S4, the image signal conversion unit 24 acquires an input image signal conforming to the HDR standard 1. In this case, in step S6, the determination unit 26 determines the standard indicated by the standard information acquired by the TV information acquisition unit 22 in step S2 and the standard based on the input image signal acquired by the image signal conversion unit 24 in step S4. , It is determined that they do not match.

  In this case, in step S8, the image signal conversion unit 24 attempts to convert the input image signal compliant with the HDR standard 1 into an image signal compliant with the HDR standard 2 compliant with the TV 3, but the image signal according to the present embodiment. The converter 24 cannot convert an image signal compliant with the HDR standard 1 into an image signal compliant with the HDR standard 2. Therefore, the image signal conversion unit 24 acquires an input image signal compliant with the HDR standard 4 from the transmitter 7. As an example of a method in which the image signal conversion unit 24 acquires an input image signal compliant with the HDR standard 4 from the transmitter 7, the image signal conversion unit 24 inputs an input image signal compliant with the HDR standard 4 to the transmitter 7. The required configuration is listed.

  As described above, when the STB 1 in the present embodiment acquires a signal that cannot be converted into the HDR standard that the TV 3 complies with, the TV 3 complies with the transmitter 7 that can transmit a signal corresponding to each of the plurality of HDR standards. Obtain a signal that can be converted to the HDR standard. Therefore, the STB 1 can acquire an appropriate input image signal according to the HDR standard that the TV 3 complies with.

[Example of software implementation]
The control block (particularly the STB control unit 14) of the STB 1 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or realized by software using a CPU (Central Processing Unit). May be.

  In the latter case, the STB 1 is a CPU that executes instructions of a program that is software that realizes each function, a ROM (Read Only Memory) or a storage device in which the program and various data are recorded so as to be readable by a computer (or CPU). (These are referred to as “recording media”), and a RAM (Random Access Memory) for expanding the program. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal in which the program is embodied by electronic transmission and embedded in a carrier wave.

[Summary]
A signal conversion device (STB1) according to aspect 1 of the present invention is a signal conversion device that converts an image signal in accordance with a second video format having a wider luminance range than the first video format, from the display device (TV3). An acquisition unit (TV information acquisition unit) that acquires standard information indicating a standard of one or a plurality of videos according to the second video format, and an output target image signal includes the standard information When the determination unit (26) that determines whether or not it conforms to the standard indicated, and the determination unit determines that the image signal to be output is not compliant with the standard indicated by the standard information, A conversion unit (image signal conversion unit 24) that converts the output image signal so as to comply with the standard indicated by the standard information, and the image signal converted by the conversion unit is displayed in the table above. Comprising an output unit that outputs to the device (image signal output unit), a.

  According to the above configuration, the signal conversion device according to this aspect is compliant with the video standard (hereinafter referred to as the HDR standard) conforming to the second video format with a wide luminance range, which the display device supports, and the image signal to be output. When the HDR standard is different, the image signal to be output is converted to be an HDR standard image signal that the display device conforms to. Therefore, the signal conversion device according to this aspect can appropriately display the image indicated by the image signal conforming to the HDR standard different from the HDR standard conforming to the display device on the display device.

  The signal conversion device according to aspect 2 of the present invention is the signal conversion apparatus according to aspect 1, in which a priority order is predetermined for each of a plurality of video standards according to the second video format, and a plurality of standard information acquired by the acquisition unit. If the information indicates the video standard, the conversion unit determines that the output target image signal conforms to the video standard having a higher priority among the plurality of video standards indicated by the standard information. You may convert so that it may become.

  According to the above configuration, the signal conversion apparatus according to this aspect converts an image signal to be output into a more appropriate HDR standard image signal even when the display apparatus supports a plurality of HDR standards. be able to.

  In the signal conversion device according to aspect 3 of the present invention, in the above aspect 1, any one of a plurality of video standards according to the second video format is associated with each of a plurality of image quality settings that can be set in the display device. The acquisition unit further acquires image quality setting information indicating the image quality setting set in the display device, and the conversion unit acquires the image signal to be output that has been acquired by the acquisition unit. You may convert so that it may become based on the standard of the image | video linked | related with the image quality setting which information shows.

  According to said structure, the signal converter which concerns on this aspect can convert into the image signal of the HDR specification suitable for the image quality setting currently set in the display apparatus.

  In the signal conversion device according to aspect 4 of the present invention, in the aspect 1, any of a plurality of video standards in accordance with the second video format is associated with each of the content genres represented by the image signal to be output. The converting unit may convert the image signal to be output in accordance with a video standard associated with the genre of the content represented by the image signal to be output.

  According to said structure, the signal converter which concerns on this aspect can convert the image signal of output object into the image signal of the HDR specification suitable for the content which the image signal of output object expresses.

  A signal conversion device according to aspect 5 of the present invention is a standard that supplies information indicating a plurality of video standards according to the second video format, which is based on the output signal of the signal conversion device, to the display device according to aspect 1 An information supply unit, wherein the acquisition unit further acquires selection information indicating which video standard according to which second video format is selected, and the conversion unit receives the image signal to be output, You may convert so that it may become an image signal of the standard of a picture which selection information which the above-mentioned acquisition part acquired shows.

  According to said structure, the signal converter which concerns on this aspect can convert the image signal of an output target into the image signal of the HDR specification which the user of a display apparatus desires.

  A signal conversion device according to aspect 6 of the present invention is the signal conversion apparatus according to any one of the above aspects 1 to 5, in which the display device does not comply with any one or more video standards according to the second video format. The conversion unit may convert the image signal to be output into a video image signal conforming to the first video format.

  According to said structure, the signal converter which concerns on this aspect can convert into the image signal which a display apparatus can display, even if it is a case where a display apparatus is not based on either of HDR standards.

  The signal conversion device according to aspect 7 of the present invention provides the signal conversion device according to any one of the above aspects 1 to 6, wherein the output target is transmitted from a transmitter capable of transmitting a signal corresponding to each of a plurality of video standards according to the second video format. A signal that further includes a receiving unit (image signal converting unit 24) that acquires an image signal, and the image signal to be output can be converted by the converting unit into a video standard that conforms to the second video format that the display device conforms to. If not, the receiving unit may acquire a signal that can be converted into a video standard conforming to the second video format with which the display device conforms.

  According to said structure, the signal converter which concerns on this aspect can acquire the image signal of an appropriate output target according to the HDR specification with which a display apparatus is based.

  The signal conversion device according to aspect 8 of the present invention functions as a set-top box in any of the above aspects 1 to 7.

  According to said structure, the set top box which functions as a signal converter concerning any one of the said aspects 1-7 is realizable.

  The television receiver which concerns on aspect 9 of this invention is equipped with the signal converter device in any one of the said aspects 1-7.

  According to said structure, the television receiver which functions as a signal converter concerning any one of the said aspects 1-7 is realizable.

  The signal conversion device according to each aspect of the present invention may be realized by a computer. In this case, the signal conversion device is operated on each computer by causing the computer to operate as each unit (software element) included in the signal conversion device. Also included in the scope of the present invention are a program of a signal conversion device to be realized and a computer-readable recording medium on which the program is recorded.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

1 Set-top box (STB, signal converter)
3 Television receiver (TV, display device)
7 Transmitter 22 TV information acquisition unit (acquisition unit)
24 Image signal converter (converter, receiver)
26 determination unit 28 image signal output unit (output unit)
34 TV control unit 42 TV information management unit 44 Display control unit 100 Display system

Claims (11)

  1. A signal conversion device for converting an image signal according to a second video format having a wider luminance range than the first video format,
    An acquisition unit that acquires standard information indicating a standard of one or a plurality of videos according to the second video format corresponding to the display device from the display device;
    A determination unit that determines whether an image signal to be output is compliant with a standard indicated by the standard information;
    When the determination unit determines that the image signal to be output does not conform to the standard indicated by the standard information, the image signal to be output conforms to the standard indicated by the standard information. A conversion unit for conversion;
    An output unit that outputs the image signal converted by the conversion unit to the display device;
    A signal conversion device comprising:
  2. Priorities are predetermined for each of a plurality of video standards according to the second video format,
    When the standard information acquired by the acquisition unit is information indicating a plurality of video standards,
    The conversion unit converts the image signal to be output so as to be compliant with a video standard having a high priority among a plurality of video standards indicated by the standard information;
    The signal conversion apparatus according to claim 1.
  3. Each of a plurality of image quality settings that can be set in the display device is associated with any of a plurality of video standards according to the second video format,
    The acquisition unit further acquires image quality setting information indicating image quality settings set in the display device,
    The conversion unit converts the output target image signal so as to comply with a video standard associated with the image quality setting indicated by the image quality setting information acquired by the acquisition unit.
    The signal conversion apparatus according to claim 1.
  4. Each of the content genres represented by the image signal to be output is associated with one of a plurality of video standards according to the second video format,
    The converting unit converts the image signal to be output in accordance with a video standard associated with a genre of content represented by the image signal to be output;
    The signal conversion apparatus according to claim 1.
  5. A standard information supply unit that supplies the display device with information indicating the standards of a plurality of videos that conform to the second video format and that conforms to the output signal of the signal conversion device;
    The acquisition unit further acquires selection information indicating which video format according to which second video format is selected,
    The conversion unit converts the image signal to be output into an image signal of a video standard indicated by the selection information acquired by the acquisition unit.
    The signal conversion apparatus according to claim 1.
  6. If the display device does not comply with any one or more video standards according to the second video format;
    The converting unit converts the image signal to be output into an image signal of a video according to the first video format;
    The signal conversion apparatus according to claim 1, wherein the signal conversion apparatus is a signal conversion apparatus.
  7. A receiver for acquiring the output target image signal from a transmitter capable of transmitting a signal corresponding to each of a plurality of video standards according to the second video format;
    When the image signal to be output is not a signal that can be converted by the conversion unit into a video standard conforming to the second video format that the display device conforms to, the reception unit receives the second signal that the display device conforms to. Obtain a signal that can be converted to a video standard according to the video format,
    The signal conversion apparatus according to claim 1, wherein the signal conversion apparatus includes:
  8.   The signal conversion device according to claim 1, wherein the signal conversion device functions as a set-top box.
  9.   A television receiver comprising the signal conversion device according to claim 1.
  10.   A program for causing a computer to function as the signal conversion device according to any one of claims 1 to 7, for causing the computer to function as the acquisition unit, the determination unit, the conversion unit, and the output unit. program.
  11.   The computer-readable recording medium which recorded the program of Claim 10.
JP2016060858A 2016-03-24 2016-03-24 Signal converter, signal conversion method, television receiver, program, and recording medium Pending JP2017175459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016060858A JP2017175459A (en) 2016-03-24 2016-03-24 Signal converter, signal conversion method, television receiver, program, and recording medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016060858A JP2017175459A (en) 2016-03-24 2016-03-24 Signal converter, signal conversion method, television receiver, program, and recording medium
PCT/JP2017/005964 WO2017163692A1 (en) 2016-03-24 2017-02-17 Signal conversion device, signal conversion method, television receiver, program, and recording medium

Publications (1)

Publication Number Publication Date
JP2017175459A true JP2017175459A (en) 2017-09-28

Family

ID=59901141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016060858A Pending JP2017175459A (en) 2016-03-24 2016-03-24 Signal converter, signal conversion method, television receiver, program, and recording medium

Country Status (2)

Country Link
JP (1) JP2017175459A (en)
WO (1) WO2017163692A1 (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001111914A (en) * 1999-10-06 2001-04-20 Toshiba Corp Digital video device and digital video system
JP2007036886A (en) * 2005-07-28 2007-02-08 Sharp Corp Communication equipment, content receiver, content-transferring program and recording medium
JP2011030028A (en) * 2009-07-27 2011-02-10 Canon Inc Display control device and method for controlling the same
JP2011166557A (en) * 2010-02-12 2011-08-25 Panasonic Corp Video/audio signal receiver and method of controlling the same
JP2013530562A (en) * 2010-04-14 2013-07-25 シズベル テクノロジー エス.アール.エル. How to display a video stream according to a customized format
JP2014082737A (en) * 2012-09-26 2014-05-08 Sharp Corp Display control device, television receiver, display control method, program, and recording medium
US20150243200A1 (en) * 2014-02-25 2015-08-27 Apple Inc. Non-linear display brightness adjustment
WO2015198554A1 (en) * 2014-06-23 2015-12-30 パナソニックIpマネジメント株式会社 Conversion method and conversion apparatus
WO2016002154A1 (en) * 2014-06-30 2016-01-07 パナソニックIpマネジメント株式会社 Data reproduction method and reproduction device
WO2016017397A1 (en) * 2014-07-31 2016-02-04 ソニー株式会社 Transmission apparatus, transmission method, reception apparatus and reception method
EP2983354A1 (en) * 2014-08-08 2016-02-10 LG Electronics Inc. Video data processing method and device for display adaptive video playback

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001111914A (en) * 1999-10-06 2001-04-20 Toshiba Corp Digital video device and digital video system
JP2007036886A (en) * 2005-07-28 2007-02-08 Sharp Corp Communication equipment, content receiver, content-transferring program and recording medium
JP2011030028A (en) * 2009-07-27 2011-02-10 Canon Inc Display control device and method for controlling the same
JP2011166557A (en) * 2010-02-12 2011-08-25 Panasonic Corp Video/audio signal receiver and method of controlling the same
JP2013530562A (en) * 2010-04-14 2013-07-25 シズベル テクノロジー エス.アール.エル. How to display a video stream according to a customized format
JP2014082737A (en) * 2012-09-26 2014-05-08 Sharp Corp Display control device, television receiver, display control method, program, and recording medium
US20150243200A1 (en) * 2014-02-25 2015-08-27 Apple Inc. Non-linear display brightness adjustment
WO2015198554A1 (en) * 2014-06-23 2015-12-30 パナソニックIpマネジメント株式会社 Conversion method and conversion apparatus
WO2016002154A1 (en) * 2014-06-30 2016-01-07 パナソニックIpマネジメント株式会社 Data reproduction method and reproduction device
WO2016017397A1 (en) * 2014-07-31 2016-02-04 ソニー株式会社 Transmission apparatus, transmission method, reception apparatus and reception method
EP2983354A1 (en) * 2014-08-08 2016-02-10 LG Electronics Inc. Video data processing method and device for display adaptive video playback

Also Published As

Publication number Publication date
WO2017163692A1 (en) 2017-09-28

Similar Documents

Publication Publication Date Title
KR101785671B1 (en) Method and apparatus for processing video data for display adaptive image reproduction
CN104813666B (en) Decoding device and decoding method, encoding device, and computer-readable medium
US10225538B2 (en) Transmission apparatus, method of transmitting image data in high dynamic range, reception apparatus, method of receiving image data in high dynamic range, and program
US9736419B2 (en) Converting method and converting apparatus for converting luminance value of an input video into a second luminance value
US10484657B2 (en) Reproduction method and reproduction apparatus
US20160212397A1 (en) Systems, apparatus and methods for mapping between video ranges of image data and a display
JP2017184249A (en) Display device, display method, and computer program
US10291955B2 (en) Method for transmitting appropriate meta data to display device according to transmission protocol version
US9712781B2 (en) Method and apparatus for transmitting and receiving ultra-high definition broadcasting signal for high dynamic range representation in digital broadcasting system
JP5604827B2 (en) Transmitting apparatus, receiving apparatus, program, and communication system
JP6566320B2 (en) Data output device and data output method
EP2111041B1 (en) Audio processing device, audio processing method, and program
CN106134172B (en) Display system, display methods and display device
JP6733547B2 (en) Image processing apparatus and image processing method
US8275232B2 (en) Apparatus and method of transmitting / receiving multimedia playback enhancement information, VBI data, or auxiliary data through digital transmission means specified for multimedia data transmission
JP6292495B2 (en) Reproduction method and reproduction apparatus
CN106233741B (en) Data reproducing method and reproducing apparatus
US9787968B2 (en) Transmission apparatus, transmission method, reception apparatus, reception method, and transmission/reception system using audio compression data stream as a container of other information
US8117330B2 (en) Information processing device for relaying streaming data
CN106105177B (en) Transform method and converting means
US7821577B2 (en) Display device and method of driving the same
RU2479147C2 (en) System of data transfer, device of transfer, method of transfer, device of reception and method of reception
EP3145167B1 (en) Conversion method and conversion device
EP3214841A1 (en) Transmission method, reception method, transmitting device, and receiving device
US20100169925A1 (en) Broadcast receiver and output control method thereof

Legal Events

Date Code Title Description
A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20170905