# US 2013/0278642 A1 · Perceptual lossless display power reduction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0278642 A1 - Document ID: US20130278642A1 - Status: Published application - Kind: A1 - Application number: 13/793,906 - Filed: 2013-03-11 - Published: 2013-10-24 - Earliest claimed: 2012-04-20 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Mian Dong; Zhan Ma; Felix C.A. Fernandes; Sungoh Hwang - Web page: https://patentgrep.com/patent/US20130278642A1 ## CPC - G09G 3/001: {using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background (slide projectors per se G03B23/00 = 42 HP)} - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - H04N 5/57: Control of contrast or brightness - H04N 5/63: Generation or supply of power specially adapted for television receivers - H04N 21/23614: {Multiplexing of additional data and video streams (arrangements for simultaneous broadcast of plural pieces of information H04H20/28)} - H04N 21/4436: {Power management, e.g. shutting down unused components of the receiver (power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418)} - H04N 21/6547: comprising parameters, e.g. for client setup - H04N 21/8186: {specially adapted to be executed by a peripheral of the client device, e.g. by a reprogrammable remote control} - H04N 21/8456: {by decomposing the content in the time domain, e.g. in time segments} - G09G 2330/021: Power management, e.g. power saving - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Segments for a video are transmitted in payload units with an extended network abstraction layer unit (NALU) header or supplemental enhancement information (SEI) message within which is embedded display adaptation information that may be employed to control display brightness and thereby reduce power consumption during display of the respective segment. The display adaptation information includes at least a maximum pixel brightness that may be used to scale pixel brightness and correspondingly reduce backlighting for liquid crystal displays, or to adjust the supply voltage for OLED displays. The maximum pixel brightness is set to a level saturating a portion of the pixel histogram without perceptual loss to the viewer, resulting in further reduction of power consumption. ## Claims ### Claim 1 A method, comprising: receiving data for a video segment, the received data including display adaptation information for adapting one or more display parameters affecting display brightness and power consumption while saturating a portion of display pixels without perceptual loss; and during display of the video segment, adapting at least one display parameter for a display based upon the display adaptation information from the extended header. ### Claim 2 (depends on 1) The method according to claim 1, wherein the display adaptation information comprises one or more of a maximum pixel brightness value corresponding to saturation of a portion of display pixels without perceptual loss, a minimum pixel brightness value and a pixel brightness histogram step size value. ### Claim 3 (depends on 2) The method according to claim 2, further comprising: scaling pixel brightness for pixels and backlighting brightness based on the maximum pixel brightness value from the display adaptation information during display of the video segment on a backlit liquid crystal display (LCD). ### Claim 4 (depends on 3) The method according to claim 3, further comprising: scaling the pixel brightness and the backlighting brightness based on the maximum pixel brightness value and a minimum pixel brightness value from the display adaptation information during display of the video segment on the backlit LCD. ### Claim 5 (depends on 4) The method according to claim 4, further comprising: scaling the pixel brightness and the backlighting brightness based on the maximum pixel brightness value, the minimum pixel brightness value, and a pixel histogram step size value from the display adaptation information during display of the video segment on the LCD. ### Claim 6 (depends on 1) The method according to claim 1, wherein the display adaptation information comprises an identifier indicating a scaling method selected from a scaling method preserving brightness, a scaling method preserving contrast, and a perceptually lossless scaling method. ### Claim 7 (depends on 2) The method according to claim 2, further comprising: scaling pixel brightness for pixels and a supply voltage based on the maximum pixel brightness value from the display adaptation information during display of the video segment on an organic light emitting diode (OLED) display. ### Claim 8 A system, comprising: a receiver configured to receive data for a video segment, the received data including display adaptation information for adapting one or more display parameters affecting display brightness and power consumption while saturating a portion of display pixels without perceptual loss; and a processor configured, during display of the video segment, to adapt at least one display parameter for a display based upon the display adaptation information from the extended header. ### Claim 9 (depends on 8) The system according to claim 8, wherein the display adaptation information comprises one or more of a maximum pixel brightness value corresponding to saturation of a portion of display pixels without perceptual loss, a minimum pixel brightness value and a pixel brightness histogram step size value. ### Claim 10 (depends on 9) The system according to claim 9, wherein the processor is configured to scale pixel brightness for pixels and backlighting brightness based on the maximum pixel brightness value from the display adaptation information during display of the video segment on a backlit liquid crystal display (LCD). ### Claim 11 (depends on 10) The system according to claim 10, wherein the processor is configured to scale the pixel brightness and the backlighting brightness based on the maximum pixel brightness value and a minimum pixel brightness value from the display adaptation information during display of the video segment on the backlit LCD. ### Claim 12 (depends on 11) The system according to claim 11, wherein the processor is configured to scale the pixel brightness and the backlighting brightness based on the maximum pixel brightness value, the minimum pixel brightness value, and a pixel histogram step size value from the display adaptation information during display of the video segment on the LCD. ### Claim 13 (depends on 8) The system according to claim 8, wherein the display adaptation information comprises an identifier indicating a scaling method selected from a scaling method preserving brightness, a scaling method preserving contrast, and a perceptually lossless scaling method. ### Claim 14 (depends on 9) The system according to claim 9, wherein the processor is configured to scale pixel brightness for pixels and a supply voltage based on the maximum pixel brightness value from the display adaptation information during display of the video segment on an organic light emitting diode (OLED) display. ### Claim 15 (depends on 8) A mobile communications device including the system according to claim 8, wherein the system is configured to receive the data for the video segment in wireless communications from a base station. ### Claim 16 (depends on 8) A tablet including the system according to claim 8, wherein the system is configured to receive the data for the video segment in wireless communications from a network. ### Claim 17 A method, comprising: formatting data for a video segment for transmission, the formatted data including display adaptation information for adapting one or more display parameters affecting display brightness and power consumption while saturating a portion of display pixels without perceptual loss, and one or more payload units containing data for displaying the video segment. ### Claim 18 (depends on 17) The method according to claim 17, wherein the display adaptation information comprises one or more of a maximum pixel brightness value corresponding to saturation of a portion of display pixels without perceptual loss, a minimum pixel brightness value and a pixel brightness histogram step size value. ### Claim 19 (depends on 17) The method according to claim 17, wherein the display adaptation information comprises an identifier indicating a scaling method selected from a scaling method preserving brightness, a scaling method preserving contrast, and a perceptually lossless scaling method. ### Claim 20 A system, comprising: a video server configured to format data for a video segment for transmission, the formatted data including display adaptation information for adapting one or more display parameters affecting display brightness and power consumption while saturating a portion of display pixels without perceptual loss, and one or more payload units containing data for displaying the video segment. ### Claim 21 (depends on 20) The system according to claim 20, wherein the display adaptation information comprises one or more of a maximum pixel brightness value corresponding to saturation of a portion of display pixels without perceptual loss, a minimum pixel brightness value and a pixel brightness histogram step size value. ### Claim 22 (depends on 20) The system according to claim 20, wherein the display adaptation information comprises an identifier indicating a scaling method selected from a scaling method preserving brightness, a scaling method preserving contrast, and a perceptually lossless scaling method. ### Claim 23 A method, comprising: receiving data for a video segment for transmission, the data including display adaptation information for adapting one or more display parameters affecting display brightness and power consumption while saturating a portion of display pixels without perceptual loss, and one or more payload units containing data for displaying the video segment; and transmitting the data to a device on which the video segment is to be displayed. ### Claim 24 (depends on 23) The method according to claim 23, wherein the display adaptation information comprises one or more of a maximum pixel brightness value corresponding to saturation of a portion of display pixels without perceptual loss, a minimum pixel brightness value and a pixel brightness histogram step size value. ### Claim 25 (depends on 23) The method according to claim 23, wherein the display adaptation information comprises an identifier indicating a scaling method selected from a scaling method preserving brightness, a scaling method preserving contrast, and a perceptually lossless scaling method.