共 7 条
[1]
SPEECH SIGNAL POWER IN SWITCHED MESSAGE NETWORK
[J].
BELL SYSTEM TECHNICAL JOURNAL,
1978, 57 (07)
:2695-2776
[2]
CAVANAUGH JR, 1976, BELL SYST TECH J, V55, P1315
[3]
SUBJECTIVE COMPARISON OF SELECTED DIGITAL CODECS FOR SPEECH
[J].
BELL SYSTEM TECHNICAL JOURNAL,
1978, 57 (09)
:3119-3165
[5]
LABORATORY SYSTEM FOR MEASURING LOUDNESS LOSS OF TELEPHONE CONNECTIONS
[J].
BELL SYSTEM TECHNICAL JOURNAL,
1971, 50 (08)
:2663-+
[6]
1975, NOTES DISTANCE DIALI
[7]
1973, CCITT, V5