# US 10,484,657 B2 · Reproduction method and reproduction apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,657 B2 - Document ID: US10484657B2 - Status: Granted - Kind: B2 - Application number: 16/381,812 - Filed: 2019-04-11 - Published: 2019-08-01 - Granted: 2019-11-19 - Earliest claimed: 2014-09-22 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Masayuki Kozuka; Takahiro Nishi; Kengo Terada; Tadamasa Toma - Web page: https://patentgrep.com/patent/US10484657B2 ## CPC - H04N 9/646: {for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters} - H04N 21/4518: {involving characteristics of one or more peripherals, e.g. peripheral type, software version, amount of memory available or display capabilities} - G06T 5/90: Dynamic range modification of images or parts thereof - G09G 5/00: Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators (image data processing or generation, in general G06T) - G09G 5/10: Intensity circuits - G11B 27/00: Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel - H04N 9/69: for modifying the colour signals by gamma correction (controlling camera response for colour signals H04N23/83) - H04N 9/87: Regeneration of colour television signals (H04N9/80 takes precedence) - H04N 11/24: High-definition television systems - H04N 21/234: Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs - H04N 21/431: Generation of visual interfaces {for content selection or interaction}; Content or additional data rendering - H04N 21/4318: {by altering the content in the rendering process, e.g. blanking, blurring or masking an image region (image enhancement or restoration in general G06T5/00)} - H04N 21/435: Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream - H04N 21/43635: {HDMI} - 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)} - H04N 21/4516: {involving client characteristics, e.g. Set-Top-Box type, software version or amount of memory available} - G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve - G09G 2340/06: Colour space transformation - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract In a reproduction method, a video stream has a first dynamic range where a maximum value of a luminance dynamic range is more than a predetermined luminance value, and a display apparatus displays video in a second dynamic range narrower than the first dynamic range. The reproduction method displays video based on a first reproduction signal or a second reproduction signal. The first reproduction signal is obtained by: reproducing a first video stream quantized based on a hybrid OETF without performing luminance conversion; or reproducing the first video stream subjected to the luminance conversion. The second reproduction signal is obtained by performing the luminance conversion on a second video stream not quantized based on the hybrid OETF, and reproducing the second video stream subjected to the luminance conversion. ## Claims ### Claim 1 A display method for a display apparatus that displays video based on a reproduction signal obtained from a video stream, the video stream having a first dynamic range where a maximum value of a luminance dynamic range is more than a predetermined luminance value, the display apparatus being configured to display video in a second dynamic range narrower than the first dynamic range, the display method comprising: receiving one of a first reproduction signal or a second reproduction signal; and displaying video based on the received one of the first reproduction signal or the second reproduction signal, wherein the first reproduction signal is obtained by one of: reproducing a first video stream quantized based on a hybrid optical-electro transfer function (OETF) without performing luminance conversion from the first dynamic range into the second dynamic range on a luminance of the first video stream; or performing the luminance conversion on the luminance of the first video stream and reproducing the first video stream subjected to the luminance conversion, and the second reproduction signal is obtained by performing the luminance conversion on a luminance of a second video stream not quantized based on the hybrid OETF and reproducing the second video stream subjected to the luminance conversion, and the second video stream is quantized using a Perceptual Quantizer (PQ) OETF. ### Claim 2 A display apparatus for displaying video based on a reproduction signal obtained from a video stream, the video stream having a first dynamic range where a maximum value of a luminance dynamic range is more than a predetermined luminance value, the display apparatus configured to display video in a second dynamic range narrower than the first dynamic range, the display apparatus comprising: a receiver that receives one of a first reproduction signal or a second reproduction signal; and a display that displays video based on the received one of the first reproduction signal or the second reproduction signal, wherein the first reproduction signal is obtained by one of: reproducing a first video stream quantized based on a hybrid optical-electro transfer function (OETF) without performing luminance conversion from the first dynamic range into the second dynamic range on a luminance of the first video stream; or performing the luminance conversion on the luminance of the first video stream and reproducing the first video stream subjected to the luminance conversion, and the second reproduction signal is obtained by performing the luminance conversion on a luminance of a second video stream not quantized based on the hybrid OETF and reproducing the second video stream subjected to the luminance conversion, and the second video stream is quantized using a Perceptual Quantizer (PQ) OETF. ### Claim 3 A display method for a display apparatus that displays video based on a reproduction signal obtained from a video stream, the video stream having a first dynamic range where a maximum value of a luminance dynamic range is more than a predetermined luminance value, the display apparatus being configured to display video in a second dynamic range narrower than the first dynamic range, the display method comprising: receiving one of a first reproduction signal or a second reproduction signal; and displaying video based on the received one of the first reproduction signal or the second reproduction signal, wherein the first reproduction signal is obtained by one of: reproducing a first video stream quantized based on a hybrid optical-electro transfer function (OETF) without performing luminance conversion from the first dynamic range into the second dynamic range on a luminance of the first video stream; or performing the luminance conversion on the luminance of the first video stream and reproducing the first video stream subjected to the luminance conversion, and the second reproduction signal is obtained by performing the luminance conversion on a luminance of a second video stream not quantized based on the hybrid OETF and reproducing the second video stream subjected to the luminance conversion, and the video stream includes information indicating whether or not the video stream is quantized based on the hybrid OETF. ### Claim 4 A display apparatus for displaying video based on a reproduction signal obtained from a video stream, the video stream having a first dynamic range where a maximum value of a luminance dynamic range is more than a predetermined luminance value, the display apparatus configured to display video in a second dynamic range narrower than the first dynamic range, the display apparatus comprising: a receiver that receives one of a first reproduction signal or a second reproduction signal; and a display that displays video based on the received one of the first reproduction signal or the second reproduction signal, wherein the first reproduction signal is obtained by one of: reproducing a first video stream quantized based on a hybrid optical-electro transfer function (OETF) without performing luminance conversion from the first dynamic range into the second dynamic range on a luminance of the first video stream; or performing the luminance conversion on the luminance of the first video stream and reproducing the first video stream subjected to the luminance conversion, and the second reproduction signal is obtained by performing the luminance conversion on a luminance of a second video stream not quantized based on the hybrid OETF and reproducing the second video stream subjected to the luminance conversion, and the video stream includes information indicating whether or not the video stream is quantized based on the hybrid OETF.