Media data processing method, apparatus and system

A media data processing apparatus, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium for storing instructions which, when executed by the processor, cause the processor to perform a method comprising:
• obtaining an optical signal of a sampling point by a collection device at the source end in an acquisition of media data;
• acquiring an optical signal intensity of the optical signal of the sampling point and a display brightness of a display device at destination end;
• determining an opto-electronic transfer control parameter according to the optical signal intensity of the optical signal of the sampling point and the display brightness;
• performing opto-electronic transfer on the optical signal of the sampling point according to the opto-electronic transfer control parameter to obtain a transferred electrical signal;
• and
• encoding the electrical signal and the opto-electronic transfer control parameter to obtain a bitstream;
• wherein acquiring the optical signal intensity of the optical signal of the sampling point and the display brightness of the display device at destination end comprises:
• acquiring a maximum optical signal intensity and a minimum optical signal intensity of optical signal intensities of optical signals of sampling points;
• and
• acquiring a maximum brightness and a minimum brightness of the display device at destination end;
• and
• wherein determining the opto-electronic transfer control parameter according to the optical signal intensity of the optical signal of the sampling point and the display brightness of the display device at destination end comprises:
• p
• =
• M
• N
• ·
• H
• L
• wherein, P denotes the opto-electronic transfer control parameter;
• M denotes the maximum brightness of the display device at destination end;
• N denotes the minimum brightness of the display device at destination end;
• H denotes the maximum optical signal intensity;
• and L denotes the minimum optical signal intensity.