1-3
System Description
602-13729-01 Rev B
Expedio Digital Electronic News Gathering Radio
1.2.3 Video
Encoder
Video input is Composite video at 75ohms BNC, with a monitor port available.
There are 2 Audio channels whose input are through the XLR connections.
The data is encoded using advanced MPEG-2 encoding technology. The
compressed data is formatted and transmitted using the DVB-ASI standard. The unit
compresses the incoming video using an adaptive field/frame MPEG-2 Main Profile
@ Main Level algorithm, achieving variable bit rate of 512 Kbps-12 Mbps.
c] The Data Output that is DVB-SPI shall be converted to DVB-ASI with the data to
be 188 byte only, the COFDM modulator will insert the Reed Solomon Encoding
frames.
Standard Compliance
Video Encoding
ISO/IEC 13818-2 (MPEG-2), 4:2:0 MP@ML,
and MP@LL
System Multiplexing
ISO/IEC 13818-1 (MPEG-2).
Generated Stream Types
Video ES
Video Elementary Stream.
Audio ES
Packetized Audio Elementary Stream.
Video PES
Packetized Video Elementary Stream.
Program Program
Stream.
Transport Transport
Stream.
Video Encoder
Video Input Format
Analog
: Composite NTSC (30 fps),
Composite PAL(25 fps)
Video Input Bit Resolution
9 bits.
Preprocessor
Programmable 2D (7x6) filter. Temporal and Spatial noise
reduction.
Bit Rates
CBR and VBR, 512 Kbps to 12 Mbps.
Bit Rate Resolution
1000 Hz
Variable Frame Rate
Programmable frame rate decimation (1 fps through 30/25
fps) support for low bit rate applications.
Programmable Picture Resolution
Horizontal
: 720, 640, 544, 480, 360, 320, 160
Vertical
: 112, 240, 480 (NTSC)
144, 288, 576 (PAL)
Motion Estimation
Horizontal: +/-100 H, Vertical: +/-34V.
Same search area in P and B pictures, in both forward and
backward searches.
Half PEL accuracy.
Aspect Ratio
Square, 4:3, 16:9
Picture type
I, P, B frame processing.
GOP Structure
I(M=0), IP(M=1), IPB(M=2), IPBB(M=3)