9 Trau Testing with 8 Bit A- and µ-law PCM Test Sequences
3GPP46.054Release 17Test sequences for the GSM Enhanced Full Rate (EFR) speech codecTS
In the previous clauses, tests for the transcoder in the TRAU are described, using 13 bit linear test sequences. However, these 13 bit test sequences require a special interface in the TRAU and do not allow testing in the field. In most cases the TRAU has to be set in special mode before testing.
As an alternative, the speech codec tests in the TRAU can be performed using A- or -law compressed 8 bit PCM test sequences on the A interface. For this purpose modified input test sequences (*-X.INP) are generated from the original sequences by A or law compression. As an input to the encoder they result in modified encoder output sequences (*-X.COD). The same *.dec decoder input sequences as in subclause 6.2.2. are then used to produce the output sequences *-X.OUT, which are A- or µ compressed.
The A- and µ-law compression and decompression does not change the homing frames at the encoder input. The format of all A- and -law PCM files *-X.INP and *-X.OUT is one sample (8 bit) per byte. The format of all other files is as described in clause 5.
All files are contained in archive ts_100725v080100p0.zip which accompanies the present document. The ‘X’ in the tables below with the filenames stands for A (A-law) and U (-law), respectively. The decoder input files *.dec are the same as in table 5 and are not described in this clause.
Table 8: Location and size of compressed 8 bit PCM speech codec test sequences
|
Disk No. |
File Name |
No. of frames |
Size (bytes) |
|
5-8/8 5-8/8 5-8/8 |
TEST0-X.INP TEST0-X.COD TEST0-X.OUT |
285 |
45 600 140 220 45 600 |
|
5-8/8 5-8/8 5-8/8 |
TEST1-X.INP TEST1-X.COD TEST1-X.OUT |
285 |
45 600 140 220 45 600 |
|
5-8/8 5-8/8 5-8/8 |
TEST2-X.INP TEST2-X.COD TEST2-X.OUT |
402 |
64 320 197 784 64 320 |
|
5-8/8 5-8/8 5-8/8 |
TEST3-X.INP TEST3-X.COD TEST3-X.OUT |
402 |
64 320 197 784 64 320 |
|
5-8/8 5-8/8 5-8/8 |
TEST4-X.INP TEST4-X.COD TEST4-X.OUT |
301 |
48 160 148 092 48 160 |
|
5-8/8 5-8/8 5-8/8 |
TEST5-X.INP TEST5-X.COD TEST5-X.OUT |
224 |
35 840 110 208 35 840 |
|
5-8/8 5-8/8 5-8/8 |
TEST6-X.INP TEST6-X.COD TEST6-X.OUT |
335 |
53 600 164 820 53 600 |
|
5-8/8 5-8/8 5-8/8 |
TEST7-X.INP TEST7-X.COD TEST7-X.OUT |
363 |
58 080 178 596 58 080 |
|
5-8/8 5-8/8 5-8/8 |
TEST8-X.INP TEST8-X.COD TEST8-X.OUT |
340 |
54 400 167 280 54 400 |
|
5-8/8 5-8/8 5-8/8 |
TEST9-X.INP TEST9-X.COD TEST9-X.OUT |
407 |
65 120 200 244 65 120 |
|
5-8/8 5-8/8 5-8/8 |
TEST10-X.INP TEST10-X.COD TEST10-X.OUT |
383 |
61 280 188 436 61 280 |
|
5-8/8 5-8/8 5-8/8 |
TEST11-X.INP TEST11-X.COD TEST11-X.OUT |
367 |
58 720 180 564 58 720 |
|
5-8/8 5-8/8 5-8/8 |
TEST12-X.INP TEST12-X.COD TEST12-X.OUT |
298 |
47 680 146 616 47 680 |
|
5-8/8 5-8/8 5-8/8 |
TEST13-X.INP TEST13-X.COD TEST13-X.OUT |
338 |
54 080 166 296 54 080 |
|
5-8/8 5-8/8 5-8/8 |
TEST14-X.INP TEST14-X.COD TEST14-X.OUT |
318 |
50 880 156 456 50 880 |
|
5-8/8 5-8/8 5-8/8 |
TEST15-X.INP TEST15-X.COD TEST15-X.OUT |
328 |
52 480 161 376 52 480 |
|
5-8/8 5-8/8 5-8/8 |
TEST16-X.INP TEST16-X.COD TEST16-X.OUT |
354 |
56 640 174 168 56 640 |
|
5-8/8 5-8/8 5-8/8 |
TEST17-X.INP TEST17-X.COD TEST17-X.OUT |
316 |
50 560 155 472 50 560 |
|
5-8/8 5-8/8 5-8/8 |
TEST18-X.INP TEST18-X.COD TEST18-X.OUT |
402 |
64 320 197 784 64 320 |
|
5-8/8 5-8/8 5-8/8 |
TEST19-X.INP TEST19-X.COD TEST19-X.OUT |
402 |
64 320 197 784 64 320 |
|
5-8/8 5-8/8 5-8/8 |
TEST20-X.INP TEST20-X.COD TEST20-X.OUT |
631 |
100 960 310 452 100 960 |
|
5-8/8 |
TEST21-X.INP |
1 |
160 |
Table 9: Location and size of compressed 8 bit PCM DTX test sequences
|
size |
bytes |
||||
|
Disk No. |
File Name |
No. of Frames |
*.INP |
*.COD |
*.OUT |
|
5-8/8 |
DTX01-X |
710 |
113 600 |
349 320 |
113 600 |
|
5-8/8 |
DTX02-X |
933 |
149 280 |
459 036 |
149 280 |
|
5-8/8 |
DTX03-X |
156 |
24 960 |
76 752 |
24 960 |
|
5-8/8 |
DTX04-X |
245 |
39 200 |
120 540 |
39 200 |
|
5-8/8 |
DTX05-X |
56 |
8 960 |
27 552 |
8 960 |
|
5-8/8 |
DTX06-X |
771 |
123 360 |
379 332 |
123 360 |
|
5-8/8 |
DTX07-X |
1188 |
190 080 |
584 496 |
190 080 |
In addition to the test sequences above, special input (seqsyncX.inp) and output (syncxxxX.cod) sequences for frame synchronization are provided. The X again stands for A and law compressed PCM. The synchronization procedure is described in clause 8.
Table 10: Location, size and justification of compressed 8 bit PCM test sequences
|
Disk No. |
Purpose of Sequence |
Name of Sequence |
No. of Frames |
Size in Bytes |
Justification |
|
5-8/8 |
Frame Synchronisation (input) |
SEQSYNCX.INP |
4 |
640 |
– |
|
5-8/8 5-8/8 5-8/8 " |
Frame Synchronisation (output) |
SYNC000X.COD SYNC001X.COD SYNC002X.COD " " " SYNC159X.COD |
1 1 1 " " " 1 |
492 492 492 " " " 492 |
Right Right Right " " " Right |
|
5-8/8 5-8/8 5-8/8 " |
Frame Synchronisation (output) |
SYNC000X.COD SYNC001X.COD SYNC002X.COD " " " SYNC159X.COD |
1 1 1 " " " 1 |
492 492 492 " " " 492 |
Right Right Right " " " Right |