Combined HDR/LDR video streaming
First Claim
Patent Images
1. A method for streaming video for high dynamic range (HDR) and low dynamic range (LDR) display, the method comprising:
- receiving frame-independent pixel values from multiple image sensors on an HDR video camera and producing a ≥
12-bit HDR signal comprising at least 12 bits for dynamic range;
tone-mapping the HDR signal to produce an 8-bit LDR signal;
subtracting the 8-bit LDR signal from the ≥
12-bit HDR signal to yield a residual signal, wherein the residual signal consists of the result of subtracting the 8-bit LDR signal from the ≥
12-bit HDR signal;
produce an output signal comprising the 8-bit LDR signal and the residual signal; and
transmitting the output signal for HDR and LDR display.
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Abstract
The invention provides methods for broadcasting video in a dual HDR/LDR format such that the video can be displayed in real time by both LDR and HDR display devices. Methods and devices of the invention process streams of pixels from multiple sensors in a frame-independent manner to produce an HDR video signal in real time. That HDR video signal is then tone-mapped to produce an LDR video signal, the LDR signal is subtracted from the HDR signal to calculate a residual signal, and the LDR signal and the residual signal are merged into a combined signal that is broadcast via a communications network.
216 Citations
12 Claims
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1. A method for streaming video for high dynamic range (HDR) and low dynamic range (LDR) display, the method comprising:
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receiving frame-independent pixel values from multiple image sensors on an HDR video camera and producing a ≥
12-bit HDR signal comprising at least 12 bits for dynamic range;tone-mapping the HDR signal to produce an 8-bit LDR signal; subtracting the 8-bit LDR signal from the ≥
12-bit HDR signal to yield a residual signal, wherein the residual signal consists of the result of subtracting the 8-bit LDR signal from the ≥
12-bit HDR signal;produce an output signal comprising the 8-bit LDR signal and the residual signal; and transmitting the output signal for HDR and LDR display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification