Method and apparatus for recording and retrieval of audio conferences

• US 5,559,875 A
• Filed: 07/31/1995
• Issued: 09/24/1996
• Est. Priority Date: 07/31/1995
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Latitude Communications, Inc. (Cisco Systems, Inc.)
• Inventors: Taylor, Stuart A., Bieselin, David N., Eaton, Glenn A., Tracy, Edward D., Wang, Emil C. W., McFadden, Joseph A.
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Wolinsky, Scott
• Application Number:
  US08/509,390
• Time in Patent Office: 421 Days
• Field of Search: 379/202, 379/201, 379/203, 379/204, 379/205, 379/67, 379/88, 379/89, 379/93, 379/96, 379/68, 348/13, 348/14, 348/15, 370/62, 370/110.1
• US Class Current: 379/202.01
• CPC Class Codes: H04M 3/42221 Conversation recording systems at the subscriber's set H04M1/656
• CPC Class Codes: H04M 3/56 Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities video conference systems H04N7/15

Abstract

An innovative recording and playback system to record and play back audio conferences. In one embodiment, the audio recorded during the conference is digitized and placed in blocks of a determined size. These blocks are stored on a computer storage medium such as a disk drive. A data structure is maintained consisting of an identification of the number and location of the voice blocks. Also provided in the data structure is the identification and location of blocks of data corresponding to the conference participants as well as the identification of other information associated with the conference. When the conference is to be played back by the user, the data structure and corresponding blocks are accessed to play back the conference as well as selectively provide the additional information, for example, the spoken names of the conference participants, to the user.

Claims

1. In an audio conferencing system, an apparatus for recording a conference comprising:

a data storage subsystem; and

a server coupled to the data storage subsystem, said server receiving input voice signals generated by conference participants during the conference, said server storing the input voice signals as voice data representative of the input voice signals in audio data blocks of a determined size and corresponding to a predetermined time duration of recording, said server further generating audio data file control blocks corresponding to the audio data blocks, and providing information regarding the audio data blocks, wherein the conference is recorded in the data storage subsystem.

2. The apparatus as set forth in claim 1, wherein said server further reads sequentially the audio data blocks from the data storage subsystem and plays back as audio voice data read from the audio data blocks to play back the recorded conference.

3. The apparatus as set forth in claim 1, further comprising a telephony subsystem which receives voice signals representative of conference participants and combines the voice signals to produce combined voice signals, said telephony subsystem coupled to the server to provide the combined voice signals as input voice signals as input to the server.

4. The apparatus as set forth in claim 1, wherein the audio data file control block further comprises a speakers field that identifies conference participants who are speaking during a portion of the conference recorded in the corresponding audio data block.

5. The apparatus as set forth in claim 1, wherein the audio data file control block further comprises a bookmark field that selectively identifies a point to begin playback of audio wherein during playback, said server skips to the audio data file control block comprising a bookmark in the bookmark field.

6. The apparatus as set forth in claim 1, further comprising a meeting record for each recorded conference, each meeting record comprising a meeting identification identifying the conference, an indication of the location of the audio data blocks of the recorded conference and an identification of an audio data block comprising voice data of the spoken name of the conference recorded.

7. The apparatus as set forth in claim 1, further comprising a meeting record for each recorded conference, each meeting record comprising a meeting identification identifying the conference, an indication of the location of the audio data blocks of the recorded conference and an identification of audio data blocks comprising voice data of a conference announcement regarding the conference recorded.

8. The apparatus as set forth in claim 1, further comprising a meeting record for each recorded conference, each meeting record comprising a meeting identification identifying the conference, an indication of the location of the audio data blocks of the recorded conference and an identification of audio data blocks comprising voice data of spoken names of conference participants to the conference recorded.

9. The apparatus as set forth in claim 1, further comprising a meeting record for each recorded conference, each meeting record comprising a meeting identification identifying the conference, an indication of the location of the audio data blocks of the recorded conference and an identification of audio data blocks comprising a conference agenda of the conference recorded.

10. The apparatus as set forth in claim 1, further comprising a meeting record for each recorded conference, each meeting record comprising a meeting identification identifying the conference, an indication of the location of the audio data blocks of the recorded conference and a posting notice to indicate users who can play back the recorded conference.

11. The apparatus as set forth in claim 1, wherein each audio data file control block provides a pointer to the location of a corresponding audio data block and a pointer to a next sequential audio data file control block.

12. The apparatus as set forth in claim 11, wherein the server further reads a first audio data file control block from the data storage subsystem, retrieves the corresponding first audio data block pointed to by the first audio data file control block and plays back as audio the first audio data block, said server further reads the next sequential audio data file control block pointed to by the first audio data file control block, retrieves the corresponding next audio data block and plays back as audio the corresponding next audio data block as audio, said server continuing to sequentially read audio data file control blocks and retrieve audio data blocks to play back the recorded conference.

13. The apparatus as set forth in claim 1, wherein the audio data file control block further comprises an entries field that identifies conference participants that join the conference during a portion of the conference recorded in the corresponding audio data block.

14. The apparatus as set forth in claim 13, wherein during playback of the recorded conference if the entries field indicates that a conference participant joined the conference during a time period of the conference recorded in the audio data block to be read and played back, said server generates an announcement that the participant entered the conference.

15. The apparatus as set forth in claim 1, wherein the audio data file control block further comprises a departure field that identifies conference participants that leave the conference during a portion of the conference recorded in the corresponding audio data block.

16. The apparatus as set forth in claim 15, wherein during playback of the recorded conference if the departure field indicates that a conference participant departed the conference during a time period of the conference recorded in the audio data block to be read and played back, said server generates an announcement that the participant departed the conference.

17. In an audio conferencing system, a method for recording a conference in a data storage subsystem comprising the steps of:

(a) receiving input voice signals generated by conference participants during the conference; and

(b) for each lapse of a predetermined time duration of recording;

storing the input voice signals as voice data representative of the input voice signals in an at least one audio data block, and

generating an audio data file control block corresponding to each audio data block of a determined size, the audio data file control block comprising information regarding the corresponding audio data block.

18. The method as set forth in claim 17, further comprising the step of playing back the recorded conference, comprising the steps of:

(c) retrieving an audio data block at a determined location;

(d) playing back as audio the voice data stored in the retrieved audio data block;

(e) determining the location of a next sequential audio data block to retrieve; and

(f) repeating steps (c), (d), and (e) for each audio block.

19. The method as set forth in claim 17, wherein each audio data file control block comprises information regarding the location of the corresponding audio data block and the location of a next sequential audio data file control block corresponding to a next audio data block.

20. The method as set forth in claim 19, further comprising the step of playing back the recorded conference, comprising the steps of:

(c) reading an audio data file control block at a determined location;

(d) retrieving the corresponding audio data block;

(e) playing back as audio the voice data stored in the corresponding audio data block;

(f) determining the location of the next sequential audio data file control block to read; and

(g) repeating steps (c), (d), (e) and (f) for each audio data file control block and audio block.

21. The method as set forth in claim 17 further comprising the steps of:

(c) storing voice signals representative of the spoken name of each conference participant in separate audio data blocks;

(d) generating audio data file control blocks corresponding to each audio data block representative of the spoken name of each conference participant; and

(e) generating a meeting record for the recorded conference comprising the steps of providing a recording pointer to a first audio data file control block corresponding to a first audio data block of a recording of the conference, and participant pointers to audio data file control blocks corresponding to audio data blocks comprising the spoken names of conference participants.

22. The method as set forth in claim 21, further comprising the step of playing back the recorded conference and identification of conference participants, comprising the steps of:

(f) reading an audio data file control block at a determined location;

(g) retrieving the corresponding audio data block;

(h) playing back as audio the voice data stored in the corresponding audio data block;

(i) determining the location of the next sequential audio data file control block to read;

(j) repeating steps (f), (g), (h) and (i) for each audio data file control block and audio block; and

(k) if a user playing back a recorded conference indicates that the conference participants are to be identified, reading audio data file control blocks corresponding to each audio data block representative of the spoken name of each conference participant, said audio data file control blocks pointed to by pointers in the meeting record, retrieving the corresponding audio data blocks and playing back the voice data stored in the audio data blocks as audio to generate the spoken name of each conference participant.