Digital Video Recorder Digital Video Recorder Advisor: Prof. Andy - PowerPoint PPT Presentation

Graduate Institute of Electronics Engineering, NTU Digital Video Recorder Digital Video Recorder Advisor: Prof. Andy Wu 2004/12/16 Thursday ACCESS IC LAB

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Outline Outline � Specification � System Architecture P2

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Specification Specification � Function: � Record NTSC composite video � Video compression/processing � Video playback: NTSC compatible composite video P3

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Digital Video Recorder Architecture Digital Video Recorder Architecture P4

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Software Hierarchy Software Hierarchy � Partition software function blocks: � ISR for frame acquiring/output � ISR for User interface � Message pass in main process � Library package: � File system � DSP library � Graphical User Interface � Plan carefully before direct access to hardware resource P5

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Common Video Format Common Video Format � Through different interfaces: � Analog Video Interfaces: � Composite NTSC video � Composite PAL video � S-Video � HDTV RGB video, YUV video � VGA video � Digital Video Interface � CCIR601 format � CCIR656 format P6

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU What is Composite Video? What is Composite Video? � Modulated chrominance is added to the luminance information along with appropriate horizontal and vertical sync signals, blanking information, and color burst information, to generate composite video waveform. P7

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Video Decoder on EZ- -KIT KIT Video Decoder on EZ � ADV7183: A multi-format SDTV Video Decoder � Automatically detect standard analog baseband television signal � Support analog input compatible to : NTSC, PAL, SECAM � Convert to 4:2:2 CCIR601/CCIR656 format � Data exchange with Blackfin processor through PPI � Note: PPI connection and Video configuration switch (SW3) � PPI7~PPI0 Connect to Decoder output data, therefore you cannot choose output CCIR601(16bit) format on EZ-KIT. � SW3 setting: P8

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Functional Block Diagram Functional Block Diagram Digital Video Signal Analog Video Signal Serial Control Interface P9

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU CCIR 601 and CCIR 656 CCIR 601 and CCIR 656 � Digital video format for transmission � CCIR 601: � 16 bit data + horizontal synchronous signal + vertical synchronous signal + clock, use 19 pins � 13.5 MHz Clock � 720 * 480 frame size � Y:Cb:Cr = 4:2:2 � CCIR 656 � 8bit data + clock, use 9 pins � 27 MHz Clock � 720 * 480 frame size � Y:Cb:Cr = 4:2:2 P10

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Output Format Output Format � How to acquire video sequence through DMA controller? Refer to \Analog Devices\VisualDSP 3.5 16-Bit\Blackfin\EZ- Kits\ADSP-BF533\Examples\Video Input\C � You can get more introduction to CCIR656 format in ADSP- BF533 Blackfin Processor Hardware Reference, page 11-14 P11

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Video Encoder on EZ- -KIT KIT Video Encoder on EZ � ADV7171: A digital PAL/NTSC Video Encoder � Support composite, component S-Video, component YUV, RGB, EuraSCART, YUV + Chroma video format � Support 4:2:2 CCIR601/CCIR656 format � Serial MPU control interface (I 2 C compatible) � Data exchange with Blackfin processor through PPI � Note: PPI connection and Video configuration switch (SW3), the same as ADV7183 P12

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Functional Block Diagram Functional Block Diagram Analog Video Signal Digital Video Signal Serial Control Interface P13

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Support Output Analog Interface Support Output Analog Interface P14

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU Several Hint Several Hint � On ADSP BF533 EZ-KIT, PPI is shared by video decoder and video encoder. � If you use open source code from Internet, even from website of Analog Device, be care of memory allocation and code optimization. � On EZ-KIT, you may simplify many part and take more time on your critical software design such as video codec kernel, rather than file format or some other things like that. P15