ZeeVee ZvCli User Manual - Manual (Page 20)

Zv‐Cli v1_3 www.zeevee.com Page 20 of 32
Set EIT Rating
This command sets a rating for all entries in the program guide. This can be useful if some content should be
excluded at some HDTVs.
The values sent follow MPEG2 and CEA‐766 specification, region 1 (USA), dimension 0 (TV‐Rating). Note that TV‐
MA‐LSV is the most extreme content, with LSV short for “Language, Sex, Violence”.
Syntax
set mpeg2 program {video1} eit‐tv‐rating { TV‐Y | TV‐G | TV‐PG |TV‐14 |TV‐MA |TV‐MA‐LSV}
factory default: TV‐G
Example:
ZvCli$ set mpeg2 program video1 eit‐tv‐rating TV‐MA
Success
MPEG2 Encoding Control
This group of commands can be used to fine‐tune the characteristics of the MPEG2 encoder. The factory
defaults have been set to values that produce the best picture, while also maximizing the chance that all HDTVs
will correctly display the encoded video. We have found that some HDTVs are sensitive to certain things like
total bit‐rate or number of bits of DC coefficients. The picture may sometimes break up, or in some cases not
display at all!
Experimenting with these settings can improve the quality of the encoded video, but we strongly advise you to
test any changes on *each type of HDTV* that may receive the signal.
Set Encoding Bit Rate
Syntax
set mpeg2 output‐data‐rate {low |normal | high} factory default: high
A digital cable (QAM) RF channel allows for a data rate up to 38.78 Mbps. Usually, that stream is divided into
multiple digital channels, each having a lower effective data rate. Since ZvBox is placing a single digital channel
in the stream, it can send more data during complex scenes, up to the 38.78 Mbps limit. This can result in
significant improvements in video quality for certain very complex scenes. However, some HDTVs will
experience some picture breakup if the data rate ever exceeds 19.4 Mbps for a single digital channel. We have
observed that this is true of some Sharp HDTVs, and may be true of others.
Normal will keep the encoder’s output data rate to 19.4 Mbps. High will allow the encoder to operate up to
38.78 Mbps. At this time, Low and Normal have the same effect.
Example:
ZvCli$ set mpeg2 output‐data‐rate high
Success