Cisco D9054 Installation And Operation Manual page 32

D9054 HD Encoder,
Subsampling
The D9054 HD Encoder supports subsambling. Subsampling decreases the
resolution of the source material in order to lower the amount of data to be
encoded.
1080i: supports full, 3/4, 2/3 and 1/2 resolution.
720p: supports full, 3/4 and 1/2 resolution.
Transport Stream
The encoded data, carrying the video and audio signals, is internally multiplexed
into the MPEG-4 and DVB compliant transport stream when the D9054 HD Encoder
is used in a stand-alone or ROSA controlled application. When the D9054 HD
Encoder is controlled by a PowerVu
(available in the future), a PowerVu multiplexer is expected to be used where
appropriate DVB tables are inserted for compliant transport. The three ASI outputs
always carry the transport stream (TS).
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D9054 HDTV Encoder Intstallation and Operation Guide
®
Network Centre (PNC) control system
4038938 Rev A