Introduction to the Basic Encoder
Page 1-8
Reference Guide: evolution 5000 E5780 and E5782 Encoder
ST.RE.E10135.4
MPEG Encoding Modes
The two stereo pairs may be configured in various encoding modes:
•
Single mono:
either the left or the right channel is encoded.
•
Dual mono:
the left and right signals are encoded and carried in the transport stream as
a single Packetised Elementary Stream (PES) data stream. The way that the left and
right signals are output from the Receiver is dependent on how the routing is set-up on
the Receiver. Both the left and the right may be output, or the left only, or the right only.
This is typically used for multilingual services. Available in MPEG-1 (layer 2) and Linear
PCM.
•
Stereo:
A stereo pair is coded as two mono signals - the two signals are output as stereo
at the receiving end.
•
Joint stereo:
A stereo pair is coded taking advantage of the stereo nature of the
channels - the two signals are output as stereo at the receiving end. Available in MPEG-1
(layer 2) only.
•
Audio Description Service
Dolby Digital Encoding Modes
•
1/0:
centre
•
2/0:
left and right
Test Tones
The equipment can be configured to generate a test tone for alignment purposes. Refer to
Annex B, Technical Specification
for level and frequency.
Audio Variable bitrate
MPEG-1 audio output bitrate (see
Annex B, Technical Specification
) is selectable in the range
32 kbit/s -384 kbit/s (dependent on configuration).
Dolby Digital
Dolby Digital audio encoding incorporates digital normalisation, pre-processing (filtering),
dynamic range compression and the addition of bitstream information. Dolby Pro Logic audio
can be carried as stereo audio through the Encoder as long as a suitably high bitrate is
selected (see
Annex B, Technical Specification
).
1.2.3
Vertical Blanking Interval (VBI) Line Processing Modes (SD)
Introduction
The Encoder has three modes for processing VBI lines.
NOTE…
A maximum of eight VBI lines per field may be extracted. This limit does not apply to Teletext.
VBI in Picture
By selecting the VBI in Picture extended active picture format available in the MPEG 4:2:2
specification the Encoder compresses and transmits the VBI data as part of the active picture.
This requires up to 3 Mbit/s of extra bitrate, depending on the amount and complexity of the
VBI present.
Содержание E5780
Страница 42: ...Options and Upgrades Page 3 4 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 176: ...Web Browser Interface Page 5 2 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 184: ...Web Browser Interface Page 5 10 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 210: ...Glossary Page A 12 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 232: ...Technical Specification Page B 22 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 236: ...Creating and Downloading a Logo Page D 2 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 248: ...Creating and Downloading a Logo Page D 14 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 250: ...Band Plans Page E 2 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 258: ...Audio Modes Page F 2 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 266: ...Audio Modes Page F 10 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 268: ...Accuracy of Frequency Sources Page G 2 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...
Страница 270: ...Use of Remux Card in ASTC Page H 2 Reference Guide evolution 5000 E5780 and E5782 Encoder ST RE E10135 4 BLANK...