METHOD FOR GENERATING A BITSTREAM RELATIVE TO IMAGE/VIDEO SIGNAL, BITSTREAM CARRYING SPECIFIC INFORMATION DATA AND METHOD FOR OBTAINING SUCH SPECIFIC INFORMATION
The present disclosure generally relates to a bitstream relative to a video signal characterized in that it carries an information data which identifies an electro-optical-transfer-function intended to be applied on the video signal before rendering the video signal on a video display. The disclosure further relates to a method for generating such a bitstream and a method for obtaining an electro-optical-transfer-function intended to be applied on a video signal before rendering the video signal on a video display.
1 . A bitstream relative to a video signal produced from an optical-electro-transfer-function, wherein the bitstream carries an information data which identifies an electro-optical-transfer-function intended to be applied on the video signal before rendering the video signal on a video display, wherein said electro-optical-transfer-function is not the inverse of the optical-electro-transfer-function used to produce the video signal.
2 . The bitstream according to claim 1 , wherein it further comprises information data that represent at least one parameter relative to said identified electro-optical-transfer-function.
3 . The bitstream according to claim 1 , wherein the electro-optical-transfer-function response is different for each chromatic channel of a mastering display and the bitstream further comprises some parameters to compensate these differences.
4 . A method for generating a bitstream relative to a video signal produced from an optical-electro-transfer-function, comprising the step of:
adding an information data which identifies an electro-optical-transfer-function intended to be applied on the video signal before rendering the video signal on a video display, wherein said electro-optical-transfer-function is not the inverse of the optical-electro-transfer-function used to produce the video signal.
5 . A method for obtaining an electro-optical-transfer-function intended to be applied on a video signal before rendering the video signal on a video display, comprising the step of:
obtaining an information data which identifies said electro-optical-transfer-function from a bitstream relative to the video signal produced from an optical-electro-transfer-function, wherein said electro-optical-transfer-function is not the inverse of the optical-electro-transfer-function used to produce the video signal.
6 . A computer program product comprising program code instructions to execute the steps of the method according to claim 4 when this program is executed on a computer.
7 . A processor readable medium having stored therein instructions for causing a processor to perform at least the steps of the method according to claim 4 .
8 . Non-transitory storage medium carrying instructions of program code for executing steps of the method according to claim 4 , when said program is executed on a computing device.
9 . A computer program product comprising program code instructions to execute the steps of the method according to claim 5 when this program is executed on a computer.
10 . A processor readable medium having stored therein instructions for causing a processor to perform at least the steps of the method according to claim 5 .
11 . Non-transitory storage medium carrying instructions of program code for executing steps of the method according to claim 5 , when said program is executed on a computing device.