《hdmi英文演示》ppt課件(文件)
【正文】 rictions on Vh and Vl HDMI Spec reduces those restrictions when connected to 165MHzcapable sink 22 Greater Bandwidth – How? Source PreEmphasis Source can use “Preemphasis” to improve performance at higher speeds and longer cables HDMI spec and earlier had restrictions on Overshoot that prevented use of preemphasis removes those restrictions +1 1 0 23 Deep Color HDMI : 24 bits/pixel HDMI : 30bit, 36bit and 48bit (10, 12, 16 bits/ponent) ? RGB 4:4:4 and YCbCr 4:4:4 24 Deep Color – Basic Mechanism Increase link clock and pack fatter pixels into more clocks ? 4 pixels into 5 clocks (for 30 bits/pixel) ? 2 pixels into 3 clocks (for 36 bits/pixel) ? 1 pixel into 2 clocks (for 48 bits/pixel) Primary Effects: ? Increased pixel clock rate (beyond 165MHz) ? New pixel packing definition and phase (includes all videorelated signaling: HSYNC, VSYNC) ? EDID indication (“upstream”) of Deep Color support ? GCP indication (“downstream”) of Deep Color mode and phase NonEffects: ? No change to HDCP ? No change to Data Islands, CTL periods (except for HSYNC, VSYNC indication) ? No change to video timings TMDS Channel B0 G0 R0 B1 G1 R1 B2 G2 R2 B3 G3 R3 0 1 2 Current 24bit Packing Pixel 0 Pixel 1 Pixel 2 Pixel 3 Time 25 B0 B0 B1 B1 G0 G0 G1 G1 R0 R0 R1 R1 B2 B2 B3 B3 G2 G2 G3 G3 R2 R2 R3 R3 TMDS 36bit Packing : 2 pixels/3 clocks Pixel 0 Pxl 0/1 Pixel 1 Pxl 2/3 Channel 0 1 2 Time 26 Pixel 3 Pixel 2 27 xvYCC Color Gamut Metadata Packet xvYCC allows a much broader selection of colors than display devices can typically handle Displays need to know how best to map “input gamut” onto “display gamut” ? Otherwi
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