DATA OUTPUT APPARATUS, DATA OUTPUT METHOD, AND DATA GENERATION METHOD

• US 20160142714A1
• Filed: 01/26/2016
• Published: 05/19/2016
• Est. Priority Date: 06/27/2014
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: TOMA, TADAMASA, KOZUKA, MASAYUKI, NISHI, TAKAHIRO, TERADA, KENGO
• Granted Patent: US 10,171,812 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04N 19/136 Incoming video signal characteristics or properties
• CPC Class Codes: H04N 19/44 Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression
• CPC Class Codes: H04N 21/4122 additional display device, e.g. video projector digital output for controlling a plurality of local displays G06F3/1423
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/43635 HDMI
• CPC Class Codes: H04N 21/4402 involving reformatting operations of video signals for household redistribution, storage or real-time display details of conversion of video standards at pixel level H04N7/01; video transcoding H04N19/40; adapting incoming signals to the display format of the display terminal G09G5/005; media handling at the source in data packet switching networks H04L65/764
• CPC Class Codes: H04N 21/4621 Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen arrangements for using the results of monitoring on user's side in broadcast systems H04H60/65; flow control in packet networks H04L47/10
• CPC Class Codes: H04N 21/4622 Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet web site content organization and management for information retrieval from the Internet G06F16/958; transmission by internet of broadcast information H04H60/82; stock exchange data over packet-switching network H04L12/1804; push services including data channel over packet-switching network H04L12/1859
• CPC Class Codes: H04N 21/6112 involving terrestrial transmission, e.g. DVB-T
• CPC Class Codes: H04N 21/631 Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols
• CPC Class Codes: H04N 21/84 Generation or processing of descriptive data, e.g. content descriptors systems specially adapted for using meta-information in broadcast systems H04H60/73
• CPC Class Codes: H04N 5/57 Control of contrast or brightness
• CPC Class Codes: H04N 7/0255 Display systems therefor
• CPC Class Codes: H04N 7/08 Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band , e.g. by time division H04N7/007 takes precedence

Abstract

A data output apparatus includes: a video decoder that decodes a video stream to generate a first video signal; an external metadata acquisition unit that acquires one or more pieces of metadata corresponding to one or more first conversion modes; an HDR metadata interpreter that interprets one of the one or more pieces of metadata to acquire characteristic data and conversion auxiliary data; a DR converter that supports one or more second conversion modes and performs conversion processing of a luminance range of the first video signal based on the conversion auxiliary data to generate a second video signal; and an HDMI output unit that outputs the second video signal to a display apparatus.

Claims

1. A data output apparatus comprising:

a decoder that decodes a video stream to generate a first video signal;

an acquisition unit that acquires one or more pieces of metadata corresponding to one or more first conversion modes in which a luminance range of a video signal is converted;

an interpreter that interprets one of the one or more pieces of metadata to acquire characteristic data indicating a luminance range of the first video signal, and conversion auxiliary data for converting the luminance range of the first video signal;

a control information generator that converts the characteristic data into control information according to a predetermined transmission protocol;

a converter that supports one or more second conversion modes in which a luminance range of a video signal is converted, the converter for performing conversion processing of the luminance range of the first video signal in one of the one or more second conversion modes based on the conversion auxiliary data to generate a second video signal with a luminance range narrower than the luminance range of the first video signal; and

an output unit that outputs the second video signal and the control information to a display apparatus in accordance with the transmission protocol.

2. The data output apparatus according to claim 1, wherein the interpreter further determines which of the data output apparatus and the display apparatus is to perform the conversion processing, based on the one or more first conversion modes, the one or more second conversion modes, and one or more third conversion modes in which a luminance range of a video signal is converted, the one or more third conversion modes being supported by the display apparatus.

3. The data output apparatus according to claim 1, wherein

the converter supports a plurality of second conversion modes including the one or more second conversion modes, and

comprises a plurality of mode processors that support the plurality of second conversion modes on a one-to-one basis, and perform processing of the supported second conversion modes.

4. The data output apparatus according to claim 1, wherein the converter comprises:

a basic processor that performs processing common to the one or more second conversion modes; and

one or more extended mode processors that support the one or more second conversion modes on a one-to-one basis, and perform processing of the supported second conversion modes.

5. The data output apparatus according to claim 1, wherein the interpreter further determines a conversion mode which is included in the one or more first conversion modes and is included in the one or more second conversion modes, as a conversion mode of the conversion processing to be performed by the data output apparatus.

6. The data output apparatus according to claim 2, wherein the interpreter further determines a conversion mode which is included in the one or more first conversion modes and is included in at least one of the one or more second conversion modes and the third conversion modes, as a conversion mode of the conversion processing to be performed by the data output apparatus or the display apparatus.

7. The data output apparatus according to claim 6, wherein

the acquisition unit acquires a plurality of pieces of metadata corresponding to a plurality of first conversion modes including the one or more first conversion modes,

the converter supports a plurality of second conversion modes including the one or more second conversion modes, and

the interpreter determines, as a conversion mode of the conversion processing to be performed by the data output apparatus or the display apparatus, a conversion mode with highest reproducibility for a master image which is an image that is output without conversion of the luminance range, from among a plurality of conversion modes which are included in the plurality of first conversion modes, and are included in at least one of the plurality of second conversion modes and the third conversion modes.

8. The data output apparatus according to claim 7, wherein, when the determined conversion mode of the conversion processing is included in the second conversion modes and is not included in the third conversion modes, the interpreter determines that the data output apparatus is to perform the conversion processing.

9. The data output apparatus according to claim 7, wherein, when the determined conversion mode of the conversion processing is included in the third conversion modes and is not included in the second conversion modes, the interpreter determines that the display apparatus is to perform the conversion processing.

10. The data output apparatus according to claim 7, wherein the interpreter further determines the conversion mode of the conversion processing to be performed by the data output apparatus or the display apparatus, according to whether a parameter for each of the plurality of first conversion modes is acquirable from the display apparatus.

11. The data output apparatus according to claim 10, wherein the interpreter determines, as a conversion mode of the conversion processing to be performed by the data output apparatus or the display apparatus, a conversion mode which is included in the plurality of first conversion modes, is included in at least one of the plurality of second conversion modes and the third conversion modes, and for which the parameter is acquirable from the display apparatus.

12. The data output apparatus according to claim 10, wherein the parameter indicates a maximum value of a displayable luminance range of the display apparatus or a displayable display mode of the display apparatus.

13. The data output apparatus according to claim 1, further comprising a down conversion unit that generates a third video signal by lowering resolution of the first video signal, wherein

the output unit further outputs the third video signal to the display apparatus.

14. The data output apparatus according to claim 13, wherein

the converter further performs the conversion processing of a luminance range of the third video signal based on the conversion auxiliary data in one of the one or more second conversion modes to generate a fourth video signal with a luminance range narrower than the luminance range of the third video signal, and

the output unit further outputs the fourth video signal to the display apparatus.

15. The data output apparatus according to claim 13, wherein, when the display apparatus does not support display of a video with the resolution of the first video signal,

(1) the down conversion unit generates the third video signal, and

(2) the output unit outputs the third video signal to the display apparatus.

16. The data output apparatus according to claim 1, wherein, when the display apparatus does not support display of a video with the luminance range of the first video signal,

(1) the converter generates the second video signal, and

(2) the output unit outputs the second video signal and the control information to the display apparatus.

17. A data output method in a data output apparatus, the data output method comprising:

a decoding step of decoding a video stream to generate a first video signal;

an acquisition step of acquiring one or more pieces of metadata corresponding to one or more first conversion modes in which a luminance range of a video signal is converted;

an interpretation step of interpreting one of the one or more pieces of metadata to acquire characteristic data indicating a luminance range of the first video signal, and conversion auxiliary data for converting the luminance range of the first video signal;

a control information generation step of converting the characteristic data into control information according to a predetermined transmission protocol;

a conversion step of generating a second video signal with a luminance range narrower than the luminance range of the first video signal, by a converter that supports one or more second conversion modes in which a luminance range of a video signal is converted performing conversion processing of the luminance range of the first video signal in one of the one or more second conversion modes based on the conversion auxiliary data; and

an output step of outputting the second video signal and the control information to a display apparatus in accordance with the transmission protocol.

18. A non-transitory computer-readable recording medium storing a program for causing a computer to execute the data output method according to claim 17.

19. A data generation method to be performed by a data generation apparatus, the data generation method comprising:

a first generation step of generating one or more pieces of metadata corresponding to one or more conversion modes in which a luminance range of a video signal is converted; and

a second generation step of generating a video stream including the video signal, the one or more pieces of metadata, and a conversion mode number indicating a number of one or more conversion modes.

20. A data output apparatus comprising:

a decoder that decodes a video stream to generate a first video signal;

an acquisition unit that acquires one or more pieces of metadata corresponding to one or more first conversion modes in which a luminance range of a video signal is converted;

an interpreter that (i) interprets one of the one or more pieces of metadata to acquire characteristic data indicating a luminance range of the first video signal, and conversion auxiliary data for converting the luminance range of the first video signal, and (ii) determines which of the data output apparatus and a display apparatus is to perform a conversion processing, based on the one or more first conversion modes, one or more second conversion modes in which a luminance range of a video signal is converted, the one or more second conversion modes being supported by the data output apparatus, and one or more third conversion modes in which a luminance range of a video signal is converted, the one or more third conversion modes being supported by the display apparatus;

a control information generator that converts the characteristic data into control information according to a predetermined transmission protocol;

a converter that converts the luminance range of the first video signal in one of the one or more second conversion modes based on the conversion auxiliary data to generate a second video signal with a luminance range narrower than the luminance range of the first video signal, when the interpreter determines the data output apparatus is to perform the conversion processing; and

an output unit that outputs the second video signal and the control information to a display apparatus in accordance with the transmission protocol.