Method for synthesizing echo effect from digital speech data

Details Method for synthesizing echo effect from digital speech data Method for synthesizing echo effect from digital speech data

1988-12-21

1990-07-24

Harkcom, Gary V.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

381 61, G10L 502, H03G 300

Patent

active

049440144

ABSTRACT:
An echo effect is synthesized in a coded digital sound signal. An input sound signal is stored as a plurality of sequential frames of similar duration, each frame (n) having characteristics including an energy (E). A delay period (d) is selected as equal to a number of time. For each frame (n) later than the duration of frames of the delay (d), the energy E(n) of the frame is compared to an attenuated energy aE(n-d) of an earlier frame (n-d), which is earlier in time than frame (n) by a number of frames equal to the delay (d). If the energy E(n) is less than the attenuated energy aE(n-d) of the earlier frame, the current frame is replaced in an output sequence with a new frame having the non-energy characteristics of the earlier frame and the attenuated energy.

REFERENCES:
patent: 4219880 (1980-08-01), Nichols
patent: 4441201 (1984-04-01), Henderson et al.
patent: 4630301 (1986-12-01), Hohl et al.

Affiliated with

Also associated with

Rating

Method for synthesizing echo effect from digital speech data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for synthesizing echo effect from digital speech data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for synthesizing echo effect from digital speech data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1272057