SLIDE 1
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P2
Digital Video Recorder Digital Video Recorder Advisor: Prof. Andy - - PowerPoint PPT Presentation
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
SLIDE 2
SLIDE 3
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P3
Specification Specification
Function:
Record NTSC composite video Video compression/processing Video playback: NTSC compatible composite video
SLIDE 4
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P4
Digital Video Recorder Architecture Digital Video Recorder Architecture
SLIDE 5
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P5
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
SLIDE 6
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P6
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
SLIDE 7
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P7
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.
SLIDE 8
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P8
Video Decoder on EZ Video Decoder on EZ-
- KIT
KIT
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:
SLIDE 9
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P9
Functional Block Diagram Functional Block Diagram
Analog Video Signal Digital Video Signal Serial Control Interface
SLIDE 10
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P10
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
SLIDE 11
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P11
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
SLIDE 12
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P12
Video Encoder on EZ Video Encoder on EZ-
- KIT
KIT
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 (I2C compatible)
Data exchange with Blackfin processor through PPI Note: PPI connection and Video configuration switch (SW3), the same as ADV7183
SLIDE 13
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P13
Functional Block Diagram Functional Block Diagram
Analog Video Signal Serial Control Interface Digital Video Signal
SLIDE 14
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P14
Support Output Analog Interface Support Output Analog Interface
SLIDE 15
ACCESS IC LAB
Graduate Institute of Electronics Engineering, NTU
P15
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
- f memory allocation and code optimization.