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version 1.4.1

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Jared Szechy
2011-08-21 03:36:53 -04:00
parent 59f8d3890e
commit b1024fba95
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@@ -1,4 +1,4 @@
Digital Speech Decoder 1.3
Digital Speech Decoder 1.4
Copyright (C) 2010 DSD Author
GPG Key ID: 0x3F1D7FD0 (74EF 430D F7F2 0A48 FCE6 F630 FAA2 635D 3F1D 7FD0)
@@ -16,10 +16,10 @@ PERFORMANCE OF THIS SOFTWARE.
DSD is able to decode several digital voice formats from discriminator
tap audio and synthesize the decoded speech. Speech
synthesis requires mbelib, which is a separate package. DSD 1.3
synthesis requires mbelib, which is a separate package. DSD 1.4.1
requires mbelib 1.1 or later.
Supported formats in version 1.3:
Supported formats in version 1.4.1:
P25 Phase 1 Widely deployed radio standard used in public safety
and amateur radio.
@@ -46,19 +46,18 @@ PERFORMANCE OF THIS SOFTWARE.
DMR/MOTOTRBO "Digital Mobile Radio" Eurpoean two slot TDMA standard.
MOTOTRBO is a popular implementation of this standard.
Support includes decoding and synthesis of speech and
the ability to save and replay .amb data files.
Support includes decoding and synthesis of speech and
the ability to save and replay .amb data files.
NXDN Digital radio standard used by NEXEDGE and IDAS brands.
Supports both 9600 baud (12.5 kHz) and
4800 baud (6.25 kHz) digital voice.
Support includes decoding and synthesis of speech and
the ability to save and replay .amb data files.
Development (no speech) support only:
NXDN (9600) Digital radio standard used by NEXEDGE and IDAS brands.
Development support only. DSD recognizes frames and can
extract the voice bits but speech is not yet decoded.
The issue is likely either an unusual interleave pattern
or a pseudo-random bit mask initialized by a "color code"
Note: not enabled by default, use -fn to enable.
D-STAR Amateur radio digital voice standard
Development support only. DSD recognized frames and can
@@ -66,9 +65,9 @@ PERFORMANCE OF THIS SOFTWARE.
D-STAR likely uses a version of AMBE not yet supported by
mbelib. The voice bit interleave pattern also needs to be
determined.
Note: not enabled by default, use -fn to enable.
Note: not enabled by default, use -fd to enable.
Unsupported formats in version 1.3 considered for future development:
Unsupported formats in version 1.4 considered for future development:
P25 Phase 2 This is not yet a published standard. Full support is
expected once the standard is published and there are
@@ -78,10 +77,7 @@ PERFORMANCE OF THIS SOFTWARE.
OpenSKY It is possible that the four slot version uses a vocoder
supported by mbelib. The two slot version does not.
NXDN (4800) This should be supportable as soon as we have .wav files
or access to a radio programmed in this format.
Supported demodulation optimizations in version 1.3:
Supported demodulation optimizations in version 1.4:
C4FM Continuous envelope 2 or 4 level FSK with relatively
sharp transitions between symbols. Used by most P25
@@ -147,19 +143,19 @@ Display modes
Errorbars mode output for P25 Phase 1 looks like this:
Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 0 tg: 32464 TDULC
Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 0 tg: 32464 TDULC
Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 0 tg: 32464 TDULC
Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 0 tg: 32464 TDULC
Sync: -p25p1 mod: C4FM input: 38% nac: 5C2 src: 0 tg: 32464 TDU
Sync: -p25p1 mod: C4FM input: 38% nac: 5C2 src: 0 tg: 32464 HDU
Sync: -p25p1 mod: C4FM input: 42% nac: 5C2 src: 0 tg: 32464 LDU1 e:
Sync: (-p25p1) mod: C4FM input: 39% nac: 5C2 src: 52610 tg: 32464 (LDU2) e:
Sync: -p25p1 mod: C4FM input: 38% nac: 5C2 src: 52610 tg: 32464 LDU1 e:
Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 52610 tg: 32464 LDU2 e:
Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 52610 tg: 32464 LDU1 e:
Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 52610 tg: 32464 LDU2 e:
Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 52610 tg: 32464 LDU1 e:
Sync: -P25p1 mod: C4FM inlvl: 39% nac: 5C2 src: 0 tg: 32464 TDULC
Sync: -P25p1 mod: C4FM inlvl: 39% nac: 5C2 src: 0 tg: 32464 TDULC
Sync: -P25p1 mod: C4FM inlvl: 39% nac: 5C2 src: 0 tg: 32464 TDULC
Sync: -P25p1 mod: C4FM inlvl: 39% nac: 5C2 src: 0 tg: 32464 TDULC
Sync: -P25p1 mod: C4FM inlvl: 38% nac: 5C2 src: 0 tg: 32464 TDU
Sync: -P25p1 mod: C4FM inlvl: 38% nac: 5C2 src: 0 tg: 32464 HDU
Sync: -P25p1 mod: C4FM inlvl: 42% nac: 5C2 src: 0 tg: 32464 LDU1 e:
Sync: (-P25p1) mod: C4FM inlvl: 39% nac: 5C2 src: 52610 tg: 32464 (LDU2) e:
Sync: -P25p1 mod: C4FM inlvl: 38% nac: 5C2 src: 52610 tg: 32464 LDU1 e:
Sync: -P25p1 mod: C4FM inlvl: 39% nac: 5C2 src: 52610 tg: 32464 LDU2 e:
Sync: -P25p1 mod: C4FM inlvl: 39% nac: 5C2 src: 52610 tg: 32464 LDU1 e:
Sync: -P25p1 mod: C4FM inlvl: 39% nac: 5C2 src: 52610 tg: 32464 LDU2 e:
Sync: -P25p1 mod: C4FM inlvl: 39% nac: 5C2 src: 52610 tg: 32464 LDU1 e:
"Sync" indicates the frame type detected and whether the polarity is
positive or negative. DSD automatically detects and handles either
@@ -179,7 +175,7 @@ Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 52610 tg: 32464 LDU1 e:
"mod" indicates the current demodulation optimizations.
"input" indicates the audio input level. QPSK signals tend to appear
"inlvl" indicates the audio input level. QPSK signals tend to appear
much "wider" than C4FM from a discriminator tap so it is important
to set your input gain using a QPSK signal if you plan to montir them.
It is not necessary nor desirable to get to 100%, in fact your sound
@@ -189,7 +185,7 @@ Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 52610 tg: 32464 LDU1 e:
"nac" is the P25 Phase 1 Network Access Code. This is a 12 bit field
in each P25 Phase 1 header. It should not be confused with the 16
bit System ID used in non-p25 trunking control channels.
bit System ID used in non-P25 trunking control channels.
"src" is the radio id of the trasmitting subscriber unit.
@@ -207,10 +203,10 @@ Sync: -p25p1 mod: C4FM input: 39% nac: 5C2 src: 52610 tg: 32464 LDU1 e:
Errorbars mode output for X2-TDMA looks like this:
Sync: -X2-TDMA mod: QPSK input: 59% src: 17211 tg: 197 [SLOT0] slot1 VOICE e:
Sync: -X2-TDMA mod: QPSK input: 47% src: 17211 tg: 197 [SLOT0] slot1 VOICE e:
Sync: -X2-TDMA mod: QPSK input: 43% src: 17211 tg: 197 [SLOT0] slot1 VOICE e:
Sync: (-X2-TDMA) mod: QPSK input: 28% src: 17211 tg: 197 [SLOT0] slot1 VOICE e:
Sync: -X2-TDMA mod: QPSK inlvl: 59% src: 17211 tg: 197 [SLOT0] slot1 VOICE e:
Sync: -X2-TDMA mod: QPSK inlvl: 47% src: 17211 tg: 197 [SLOT0] slot1 VOICE e:
Sync: -X2-TDMA mod: QPSK inlvl: 43% src: 17211 tg: 197 [SLOT0] slot1 VOICE e:
Sync: (-X2-TDMA) mod: QPSK inlvl: 28% src: 17211 tg: 197 [SLOT0] slot1 VOICE e:
DMR/MOTOTRBO display is similar except it does not yet show source
and talkgroup information.
@@ -303,10 +299,10 @@ Display Options
information displayed in Errorbars mode:
-e Show Frame Info and errorbars (default)
-pe Show p25 encryption sync bits
-pl Show p25 link control bits
-ps Show p25 status bits and low speed data
-pt Show p25 talkgroup info
-pe Show P25 encryption sync bits
-pl Show P25 link control bits
-ps Show P25 status bits and low speed data
-pt Show P25 talkgroup info
-q Don't show Frame Info/errorbars
-s Datascope (disables other display options)
-t Show symbol timing during sync
@@ -439,7 +435,8 @@ Scanner control options:
-B <num> Serial port baud rate (default=115200)
-C <device> Serial port for scanner control (default=/dev/ttyUSB0)
-R <num> Resume scan after <num> TDULC frames or any PDU
-R <num> Resume scan after <num> TDULC frames or any PDU or TSDU
On some P25 systems Packet Data Units (PDU) are sent on the same
frequencies used for voice traffic. If done constantly this can
@@ -453,7 +450,8 @@ Decoder options
-fa Auto-detect frame type (default)
-f1 Decode only P25 Phase 1
-fd Decode only D-STAR* (no audio)
-fn Decode only NXDN96* (no audio)
-fi Decode only NXDN48* (6.25 kHz) / IDAS*
-fn Decode only NXDN96 (12.5 kHz)
-fp Decode only ProVoice*
-fr Decode only DMR/MOTOTRBO
-fx Decode only X2-TDMA
@@ -465,10 +463,13 @@ Decoder options
-xx Expect non-inverted X2-TDMA signal
-xr Expect inverted DMR/MOTOTRBO signal
* denotes frame types that cannot be auto-detected.
NXDN and D-STAR are not enabled by default as they are for development
testing only and have shorter frame sync patterns that are prone to
false triggering.
ProVoice and NXDN48 not auto-detected as use different symbol
rates (9600 and 2400) than most formats (4800). D-STAR is not
enabled by default as voice decode does not work and it has a
short sync word that is prone to false triggering. It is included
for development/testing only.
MBE speech synthesis is broken down into two main types of sounds,
"Voiced" and "Unvoiced". Voiced speech bands are synthesized with