9 Trau Testing with 8 Bit A- and µ-law PCM Test Sequences

06.543GPPTest sequences for the GSM Enhanced Full Rate (EFR)TS

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 6po03i0o.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

"
"
"
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

Annex A (informative):
Change Request History

Change history

SMG No.

TDoc. No.

CR. No.

Section affected

New version

Subject/Comments

SMG#23

4.0.1

ETSI Publication

SMG#23

5.1.0

Release 1996 version

SMG#27

6.0.0

Release 1997 version

SMG#29

7.0.0

Release 1998 version

7.0.1

Version update to 7.0.1 for Publication

SMG#31

8.0.0

Release 1999 version

8.0.1

Update to Version 8.0.1 for Publication