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Video Data Processing Method and Device for Display Adaptive Video Playback

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Video Data Processing Method and Device for Display Adaptive Video Playback (19) TZZ ¥¥_T (11) EP 2 983 354 A1 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: (51) Int Cl.: 10.02.2016 Bulletin 2016/06 H04N 5/44 (2006.01) G06F 3/14 (2006.01) G09G 5/00 (2006.01) H04N 21/4363 (2011.01) (2011.01) (21) Application number: 15001639.2 H04N 21/44 (22) Date of filing: 02.06.2015 (84) Designated Contracting States: (72) Inventors: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB • Oh, Hyunmook GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO 137-893 Seoul (KR) PL PT RO RS SE SI SK SM TR • Suh, Jongyeul Designated Extension States: 137-893 Seoul (KR) BA ME Designated Validation States: (74) Representative: Katérle, Axel MA Wuesthoff & Wuesthoff Patentanwälte PartG mbB (30) Priority: 08.08.2014 US 201462034792 P Schweigerstraße 2 81541 München (DE) (71) Applicant: LG Electronics Inc. Yeongdeungpo-gu Seoul 150-721 (KR) (54) VIDEO DATA PROCESSING METHOD AND DEVICE FOR DISPLAY ADAPTIVE VIDEO PLAYBACK (57) A video data processing method and/ device for including electro optical transfer function (EOTF) type display adaptive video playback are disclosed. The video information for identifying EOTF supported by the sink data processing method includes transmitting display in- device, receiving video data from the source device via formation indicating capabilities of a sink device to a the interface, and playing the received video data back. source device via an interface, the display information EP 2 983 354 A1 Printed by Jouve, 75001 PARIS (FR) EP 2 983 354 A1 Description BACKGROUND OF THE INVENTION 5 Field of the Invention [0001] The present invention relates to processing of video data and, more particularly, to a video data processing method and device for display adaptive video playback. 10 Discussion of the Related Art [0002] As a video signal processing rate has increased, research into a method for encoding/decoding ultra high definition (UHD) video has been conducted. [0003] UHD content is aimed at providing improved image quality as compared to existing content. Research into and 15 development of a UHD video element have been conducted in various fields in addition to a broadcast field. A demand for providing an improved user experience, which has not been provided by existing content in terms of color and brightness, has increased. [0004] Therefore, efforts to increase the ranges of color and brightness among various elements configuring UHD video to provide a high-quality image have been continuously made. 20 [0005] A UHD display device is different from an existing display device in terms of improvement of color and brightness. [0006] However, under various display device conditions, technology for optimally viewing UHD content has not been developed. [0007] For example, if UHD content is supplied via a next-generation display device, the color or brightness of an image may be restricted according to the physical properties of a display device and thus content may not be appropriately 25 displayed. [0008] In order to adaptively control the color and brightness of content according to display device, content transfor- mation should be performed based on accurate analysis of the properties of the display device. However, if UHD content is supplied via an external device, delivery of the properties of the display device may be restricted. 30 SUMMARY OF THE INVENTION [0009] Accordingly, the present invention is directed a video data processing method and device for display adaptive video playback that substantially obviate one or more problems due to limitations and disadvantages of the related art. [0010] An object of the present invention is to provide a video processing method and a video processing device 35 capable of allowing a viewer to optimally view content including UHD content under various display device conditions. [0011] Another object of the present invention devised is to provide a video processing method and a video processing device capable of reducing color or brightness restrictions according to the physical properties of display devices when content including UHD content is displayed on various display devices. [0012] A further object of the present invention is to provide a video processing method and a video processing device 40 capable of allowing a viewer to optimally view content including UHD content by delivering the properties of a display device even when content including the UHD content is supplied via an external device. [0013] Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized 45 and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. [0014] To achieve these objects and other advantages and in accordance with the purpose of the invention, as em- bodied and broadly described herein, a video data processing method includes transmitting display information indicating capabilities of a sink device to a source device via an interface, the display information including electro optical transfer 50 function (EOTF) type information for identifying EOTF supported by the sink device, receiving video data from the source device via the interface, and playing the received video data back. [0015] Preferably, the display information includes dynamic range metadata indicating high dynamic range, HDR, capabilities of the sink device and the dynamic range metadata includes the EOTF type information. [0016] Preferably, the dynamic range metadata is included and transmitted in a data block and the dynamic range 55 metadata includes information for identifying that the data block includes the dynamic range metadata and information indicating the length of the data block. [0017] Preferably, the video data processing method further includes receiving video characteristics information indi- cating characteristics of the video data from the source device via the interface, wherein the video characteristics infor- 2 EP 2 983 354 A1 mation includes at least one of information indicating that there is an extension of colorimetry and information indicating the extended colorimetry. [0018] In other aspect of the present invention, a video data processing device includes a transmission unit configured to transmit display information indicating capabilities of a sink device to a source device via an interface, the display 5 information including electro optical transfer function (EOTF) type information for identifying EOTF supported by the sink device, a video reception unit configured to receive video data from the source device via the interface, and a playback unit configured to play the received video data back. [0019] Preferably, the display information includes dynamic range metadata indicating high dynamic range, HDR, capabilities of the sink device and the dynamic range metadata includes the EOTF type information. 10 [0020] Preferably, the dynamic range metadata is included and transmitted in a data block and the dynamic range metadata includes information for identifying that the data block includes the dynamic range metadata and information indicating the length of the data block. [0021] Preferably, the video data processing device further includes a signaling reception unit configured to receive video characteristics information indicating characteristics of the video data from the source device via the interface, 15 wherein the video characteristics information includes at least one of information indicating that there is an extension of colorimetry and information indicating the extended colorimetry. [0022] In other aspect of the present invention, a video data processing method includes receiving display information indicating capabilities of a sink device from the sink device via an interface, the display information including electro optical transfer function (EOTF) type information for identifying EOTF supported by the sink device, and transmitting 20 video data to the sink device via the interface. [0023] Preferably, the display information includes dynamic range metadata indicating high dynamic range, HDR, capabilities of the sink device and the dynamic range metadata includes the EOTF type information. [0024] Preferably, the dynamic range metadata is included and transmitted in a data block and the dynamic range metadata includes information for identifying that the data block includes the dynamic range metadata and information 25 indicating the length of the data block. [0025] Preferably, the video data processing method further includes transmitting video characteristics information indicating characteristics of the video data to the sink device via the interface, wherein the video characteristics information includes at least one of information indicating that there is an extension of colorimetry and information indicating the extended colorimetry. 30 [0026] In other aspect of the present invention, a video data processing device includes a reception unit configured to receive display information indicating capabilities of a sink device from the sink device via an interface, the display information including electro optical transfer function (EOTF) type information for identifying EOTF supported by the sink device, and a transmission unit configured to transmit video data to the sink device via the interface.
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