S5PC110_UM
7 6BTVOUT & VIDEO DAC
7-1
7.14 APPENDIX
7.14.1 VERTICAL BAR PHEOMENON
The goal of oversampling filter in TVOUT module is to obtain 54MHz sample-rate data for DAC from 13.5MHz/
27MHz source sample-rate. The quality of interpolation result using FIR filter depends on the number of FIR filter
taps. Unfortunately, ideal interpolation filter needs infinite number of taps, which cannot be implemented. Thus,
practical consideration into the trade-off between interpolation quality and computational complexity is needed.
In TV application, it is the sub-carrier waveform that is the most sensitive to the quality of interpolation filter.
Source rate of 13.5MHz for CVBS output is too coarse to represent the shape of sub-carrier and the quality of
interpolation highly affects the shape of resulting 54 MHz sub-carriers. The error of sub-carrier induced by non-
ideal interpolation filter is basically implies distortions in chrominance components. However, in the case of CVBS
signal, the chrominance component and the luminance component are together to be mixed and transmitted via
one channel. Then, parts of the interpolation error appears in luminance parts if the CVBS signal is separated into
luminance component and chrominance components by the comb filter of TV decoder. According to an analysis
on this interpolation error, the error pattern is repeated with a frequency of 102.3 kHz and the error spectrum is
highly concentrated around 102.3 kHz. Thus, most of interpolation error is classified into luminance part by TV
decoder and this error is shown in the shape of brightness distortion in TV monitor.
The oversampling filter in S5PC110 adopts 95-tap interpolation for CVBS signal in order to minimize the vertical
bar phenomenon. Compared to 47-tap interpolation of legacy TVOUT version, the peak of vertical bar reduces by
about 0.1 IRE assuming the use of 6th order Butterworth analog interpolation filter.
Summary of Contents for S5PC110
Page 4: ...Section 1 OVERVIEW ...
Page 28: ...Section 2 SYSTEM ...
Page 374: ...S5PC110_UM 4 POWER MANAGEMENT 4 14 4 Let DRAMs exit from self refresh mode ...
Page 473: ...S5PC110_UM 6 BOOTING SEQUENCE 6 10 Figure 6 3 Secure Booting Diagram ...
Page 474: ...Section 3 BUS ...
Page 491: ...S5PC110_UM 2 CORESIGHT Figure 2 4 Structure of the Coresight DAP Components 2 8 ...
Page 506: ...Section 4 INTERRUPT ...
Page 537: ...Section 5 MEMORY ...
Page 540: ......
Page 703: ...Section 6 DMA ...
Page 705: ...List of Figures Figure Title Page Number Number Figure 1 1 Two DMA Tops 1 1 ...
Page 737: ...Section 7 TIMER ...
Page 795: ...Section 8 CONNECTIVITY STORAGE ...
Page 883: ...S5PC110_UM 5 USB2 0 HS OTG 5 7 5 6 3 OTG FIFO ADDRESS MAPPING Figure 5 3 OTG FIFO Mapping ...
Page 1100: ...Section 9 MULTIMEDIA ...
Page 1116: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 5 Figure 1 2 Block Diagram of the Data Flow ...
Page 1125: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 14 1 3 3 2 7 16BPP Display 1555 P1 P2 P3 P4 P5 LCD Panel ...
Page 1145: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 34 Figure 1 10 Blending Decision Diagram ...
Page 1149: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 38 Figure 1 14 Hue Control Block Diagram ...
Page 1184: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 73 ...
Page 1226: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 115 ...
Page 1328: ...S5PC110_UM 2 1BCAMERA INTERFACE 2 81 ...
Page 1369: ...S5PC110_UM 4 3BMIPI CSIS 4 2 4 2 BLOCK DIAGRAM Figure 4 1 MIPI CSI System Block Diagram ...
Page 1381: ...S5PC110_UM 4 3BMIPI CSIS 4 14 ...
Page 1431: ...S5PC110_UM 6 5BMULTI FORMAT CODEC 6 39 ...
Page 1471: ...S5PC110_UM 6 5BMULTI FORMAT CODEC 6 79 Figure 6 7 VC1 Parameters ...
Page 1626: ...S5PC110_UM 10 9BHIGH DEFINITION MULTIMEDIA INTERFACE 10 17 Figure 10 10 Channel Status Block ...
Page 1775: ...S5PC110_UM 13 12BG2D 13 6 FIMG 2D FIMG 2D FIMG 2D Figure 13 3 Rotation and Flip Example ...
Page 1798: ...Section 10 AUDIO ETC ...
Page 1803: ...S5PC110_UM 1 AUDIO SUBSYSTEM 1 2 Figure 8 7 Keypad I F Block Diagram 8 8 ...
Page 1951: ...Section 11 SECURITY ...
Page 1954: ...List of Tables Table Title Page Number Number Table 1 1 Security Features of S5PC110 1 2 ...
Page 1964: ...S5PC110_UM 2 ADVANCED CRYPTO ENGINE Figure 2 9 DES Byte Swapping Scheme 2 9 ...
Page 2005: ...Section 12 ETC ...
Page 2039: ...Section 13 SIZE BALL MAP ...