1. MULTIMEDIA INPUT / OUTPUT TECHNOLOGIES
A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
FULL MOTION VIDEO

2. A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
INTRODUCTION
Most Important and Complex and allow video image processing

3. A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
VIDEO CAMERAS
Used for business multimedia Application – in terms of Image Capture and Processing
Commercial video cameras and hobby cameras
TV Viewer, Monitors
CCD

4. FULL MOTION VIDEO CONTROLLERS
A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
FULL MOTION VIDEO CONTROLLERS
Complex component – Analyse the requirements
Full Motion Video Controller Requirements
Video controller for Play back
Start at Capture Stage – Where the video to be Recorded
Professional or Unprofessional Setting – Capture based on interest
Signal Quality

5. VIDEO BOARD ARCHITECTURE
A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
VIDEO BOARD ARCHITECTURE
Similar to video frame grabber board – circuit card in a computer
Components
Video INPUT – accept the input Signal(NTSC/PAL/SECAM broadcast Signal, Video Camera or VCR
S- Video – accept RS170 input
Video Compression and Decompression Processor
Audio Compression and Decompression Processor
A/D Converter and vice versa
Audio INPUT for Stereo Audio LINE IN,CD IN (CD Audio Input)
Microphone

6. VIDEO BOARD ARCHITECTURE
A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
VIDEO BOARD ARCHITECTURE
Handle variety of audio and video input signal and convert from analog to digital and Vice versa
Also required for video playback boards
Rendering support for various television signal formats - NTSC for North America, PAL For Europe & Asia, SECAM for France and Middle East and So on - Level of Complexity of design the video boards

7. VIDEO BOARD ARCHITECTURE
A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
VIDEO BOARD ARCHITECTURE
Video Channel Multiplexer – multiple input for different video input
Video Compression and Decompression
Compress and decompress the video data
Mpeg 2 standard for real time full motion video
Motion jpeg, ITT H.261 for Video Conferencing
Provide algorithm support multiple standards for single board
On board programmable engine – video playback
Not only flexible to modify the algorithm by developing new microcode if the standards changes
Dynamically change the compression and decompression standards on file formats

8. VIDEO BOARD ARCHITECTURE
A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
VIDEO BOARD ARCHITECTURE
User to pick and choose the particular algorithm before capture and playback
Flexibility to play or create a file format with a particular algorithm
Different stage for compression and decompression processor
DCT
Inverse DCT
Quantization
Inverse Quantization
Zig Zag and Zero Runlength Encoding and Decoding
Motion Estimation and Compension

9. VIDEO BOARD ARCHITECTURE
A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
VIDEO BOARD ARCHITECTURE
Audio Compression
MPEG 2 standard for audio Compression and Decompression
Needs programmable engine on a board
Microcode for the new Algorithm – without developing the card
Adaptive pulse code modulation for sample the audio signal
Takes the difference between actual sample value and predicted sample values
Difference is then encoded by 4 bit or 8 bit value based on sampling rate

10. VIDEO BOARD ARCHITECTURE
A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
VIDEO BOARD ARCHITECTURE
A / D Converter
Inputs from video switch and convert the amplitude of a sampled analog signal to either 8bit or 16 bit value
4 Important Process
Sampling Rate
Resolution
Linearity
Conversion Speed

11. Audio Compression and Decompression
A.Aruna, Assistant Professor, Faculty of Information Technology
4/24/2017
Audio Compression and Decompression
Video Compression and Decompression
D/A Converter
Audio LINE OUT
RS 422 FOR VCR CAMERA
ISA Bus for PC
Multi Channel Video switch and A/D Converter
NTSC
PAL
SECAM
S VIDEO
Video Frame Memory
Microphone
Stereo
Line in
CD Audio in
Audio Input Switch