This paper presents an analysis of the performance of a formant tracking speech compression system under the influence of error in the control signals used to communicate the compressed speech information from the analyzer to the synthesizer. The analysis is conducted both for analog transmission, in which the seven control signal channels of 140 cps aggregate bandwidth are each perturbed by gaussian random noise, and digital transmission in which the seven analog control channels are sampled sequentially into a single binary stream of 1000 bits per second and this is subjected to varying degrees of bit error rate. The system on which these experiments have been conducted is being developed under the sponsorship of Air Force Systems Development Laboratory. In its analog transmission mode, it transmits compressed speech signals in an aggregate bandwidth of 140 cps and attains an articulation rating in excess of 80% for the speech that is synthesized. In its digital mode, it transmits the compressed speech signals in a 1000 bit per second binary coded stream and achieves an articulation rating in excess of 75% for synthesized speech.
Authors:
Campanella, S. Joseph; Coulter, David C.; Irons, Ronald E.
Affiliation:
Melpar, Incorporated, Falls Church, VA
JAES Volume 10 Issue 2 pp. 149-155; April 1962
Publication Date:
April 1, 1962
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.