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Introduction to the Basic Encoder
Instruction Manual: evolution 5000 E57xx DSNG and DENG Voyager Encoder Page 1-9
ST.TM.E10076.3
· Fully exhaustive motion estimation
· An internal frame synchroniser (see Internal Frame Synchroniser on
Page 1-10)
· Support for Active Format Descriptor (AFD) (see Chapter 4, Operating
the Equipment Locally, Table 4.36)
· Support for a variety of Group of Pictures (GOP) structures with a
variable number of B frames
· Built-in patented adaptive noise reduction circuitry
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· A logo overlay facility whereby the Encoder is able to overlay
broadcasters trademarks/logos onto the active video
Motion Estimation
Fully Exhaustive motion estimation is used. It takes a macro block of
16 pixels x 16 pixels and then performs an exhaustive search without
subsampling.
Variable Video Bit-rate
The MPEG-2 compression algorithm uses adaptive field/frame coding,
forward and backward predictive processing with motion estimation and
compensation to reduce the bit-rate to the range shown in Table 1.3.
Table 1.3: Video Bit-rate Range
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Video Encoding Mode
4:2:0 4:2:2
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1.5 Mbit/s - 15 Mbit/s 1.5 Mbit/s - 50 Mbit/s
NOTE…
Minimum bit-rate is 0.25 Mbit/s when software option M2/ESO2/PU is purchased.
Coding Resolutions
To provide optimum picture quality over the full range of supported
bit-rates, the encoded picture resolution is controlled automatically
according to the video bit-rate. Alternatively, the user can override this
and select manual control, if desired. Coding resolutions are shown in
Table 1.4.
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Noise reduction is only available when software option M2/ESO2/NR is purchased.
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The video bit-rate depends on the Multiplexer bit-rate which is set.
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4:2:2 is only available when software option M2/ESO2/422 is purchased.