Systems and methods for split echo cancellation

• US 9,503,812 B2
• Filed: 07/31/2014
• Issued: 11/22/2016
• Est. Priority Date: 07/31/2013
• Status: Active Grant

• Current Assignee: Vidyo Incorporated (Enghouse Systems Limited)
• Original Assignee: Vidyo Incorporated (Enghouse Systems Limited)
• Inventors: Shapiro, Ofer, Sharon, Ran, Eleftheriadis, Alexandros
• Primary Examiner(s): Paul, Disler
• Application Number:
  US14/448,592
• Publication Number:
  US 20150131807A1
• Time in Patent Office: 845 Days
• Field of Search: 381/66, 381/83, 381/93, 381/96
• US Class Current: 1/1
• CPC Class Codes: H04B 3/20 Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
• CPC Class Codes: H04B 3/23 using a replica of transmitted signal in the time domain, e.g. echo cancellers
• CPC Class Codes: H04B 3/231 Echo cancellers using readout of a memory to provide the echo replica
• CPC Class Codes: H04M 9/082 using echo cancellers echo cancellers per se H04B3/23
• CPC Class Codes: H04R 3/002 Damping circuit arrangements for transducers, e.g. motional feedback circuits

Abstract

Systems and methods for performing videoconferencing using split endpoints are disclosed herein. These endpoints can include a Main Unit and a Satellite Unit that are associated with each other, and where the tasks of video and audio encoding and decoding are separated between the two. In some embodiments the Main Unit performs video and audio encoding, and the Satellite Unit performs video and audio decoding. In some embodiments the Satellite Unit obtains media data through its associated Main Unit, whereas in other embodiments the Satellite Unit obtains media data directly from the Server.

Claims

1. A system for performing acoustic echo cancellation in a conferencing system, the system comprising:

one or more playback units configured to receive first audio signals and convert the first audio signals to sound, each playback unit being coupled to one or more speakers; and

one or more capture units configured to convert sound into second audio signals suitable for transmission, each capture unit being coupled to one or more microphones;

wherein each of the one or more playback units are configured to transmit a unique identification sound, wherein each of the one or more capture units are configured to identify any of the one or more playback units that are positioned within a listening distance therefrom based on the corresponding unique identification sound(s), wherein each of the one or more capture units are configured to instruct the conferencing system to transmit a copy of the first audio signals that correspond to the one or more playback units that are within the listening distance thereto, and wherein each of the one or more capture units is further configured to perform acoustic echo cancellation on the second audio signals using the copy of the first audio signals that correspond to the one or more playback units that are within the listening distance.

2. A method for performing acoustic echo cancellation in a conferencing system, the method comprising:

receiving first audio signals at one or more playback units and converting the first audio signals to sound, each playback unit being coupled to one or more speakers;

at one or more capture units converting sound into second audio signals suitable for transmission, each capture unit being coupled to one or more microphones;

at the one or more playback units, transmitting a unique identification sound;

at the one or more capture units, identifying any playback units that are within a listening distance therefrom, at the one or more capture units, instructing the conferencing system to transmit to a copy of the first audio signals that correspond to the one or more playback units that are within the listening distance thereto, and at the one or more capture units, performing acoustic echo cancellation on the second audio signals using the copy of the first audio signals that correspond to the one or more playback units that are within the listening distance.

3. A non-transitory computer readable medium comprising a set of executable instructions to direct a processor to perform the method recited in claim 2.