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參數(shù)資料
| 型號： | ZR38650 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | PROGRAMMABLE DIGITAL AUDIO PROCESSOR |
| 中文描述： | 可編程數(shù)字音頻處理器 |
| 文件頁數(shù)： | 6/66頁 |
| 文件大?。?/td> | 441K |
| 代理商： | ZR38650 |
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6
ZR38650
Software - Functions
Primary Decoding and Test Functions
AC-3
The major modes of operation of the Dolby Digital AC-3 decoder
function are summarized in Table 2. Choices are for input and
output ports and their formats including operation with audio/vid-
eo synchronization (AVS), constant or request driven PES
packetized inputs and the linear PCM of DVD.
AC-3 input decoding rates are up to 640 kbits per second. Full
selection can be made for speaker configuration, dynamic range
compression, downmixing, delays, filtering and error conceal-
ment strategy. The Karaoke downmixing is also supported
including with downloaded Karaoke coefficients.
PCM + Pro Logic
With two-channel PCM inputs, the choice of functions is four-
channel Pro Logic decoding or two-channel stereo mixing.
Selection can be made for speaker configuration, downmixing,
delays and surround filtering.
MPEG
The MPEG1 decoder function accepts either MPEG1 or MPEG2
input streams and produces either Pro Logic or two-channel
stereo outputs in DAC form. Selection can be made for speaker
configuration, dynamic range compression, downmixing, delays
and surround filtering.
Pink Noise
This is a six-channel pink (equal energy per constant proportion-
al bandwidth) pseudo-random noise generator test function. It is
for user testing of speaker balance in a listening space. The six
individual speakers can be enabled in any combination at a
single adjustable level, with or without a band-limiting filter.
SiliconSoftware Functions
3-D Audio
There are six third-party providers of 3-D audio using the
ZR38650. This function gives the effect of a three-dimensional
sound field with only two speakers. These certified functions are
Aureal A3D, Dolby Virtual Surround, Harman VMAx, QSound
QSurround, Spatializer N-2-2 and SRS TruSurround. They
work with either two- or six-channel inputs and the AC-3, MPEG
and Pro Logic decoders as shown in Table 3.
Bass Management
Depending upon the speakers used in a listening area, it can be
desirable to alter the distribution of the bass frequencies
between speakers. A choice of speaker configurations is
provided and of low-pass cut-off frequencies for 80, 100 or 120
Hertz in the simplest form. The full function allows the low-pass
and high-pass filter coefficients to be downloaded along with
individual speaker sound levels.
Bass management works with either two- or six-channel inputs
and the AC-3, MPEG and Pro Logic decoders. It does not work
with 3-D audio although some 3-D audio functions include
certain bass management features.
DVD - Linear PCM
In addition to the audio/video synchronization (AVS) and request
driven PES packetized input features of the standard decode
functions, this DVD function has 3-D audio capability and bass
management. It works with two-, six- or eight-channel PCM
inputs and the AC-3, MPEG and Pro Logic decoders.
Table 2: Primary Decoding and Test Function Options Summary
Primary
Decoding Or
Test Function
Input
Output
Data
Stream
Serial Port
A, S/PDIF,
Parallel
AVS
MPEG2
PES
Packetized
DVD
PES
Packetized
Function
Serial DAC
Ports
S/PDIF Port G
AC3
6-Channel
AC-3
SA, S/P, P
Yes
Yes
Yes
6-Channel AC-3
B,C,D
Input Stream
2-Channel Pro Logic
encoded
B
2-Channel
AC-3
SA, S/P, P
Yes
Yes
Yes
4-Channel Pro Logic
B,C,D
2-Channel AC-3
B
PCM + Pro Logic
2-Channel
PCM
SA, S/P, P
No
No
No
4-Channel Pro Logic
B,C,D
Input Stream
2-Channel PCM Mixed
B
MPEG
MPEG1
SA, S/P, P
Yes
Yes
Yes
4-Channel Pro Logic
B,C,D
Input Stream
2-Channel MPEG1
B
MPEG2
SA, S/P, P
Yes
Yes
Yes
4-Channel Pro Logic
B,C,D
2-Channel MPEG1
B
PNG
-
-
-
-
-
6-Channel Pink Noise
B,C,D
-
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