Voice processing interface for a teleconference system

• US 5,483,588 A
• Filed: 12/23/1994
• Issued: 01/09/1996
• Est. Priority Date: 12/23/1994
• 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., Eaton, Glenn A., Tracy, Edward D., Wang, Emil C. W., McFadden, Joseph A.
• Primary Examiner(s): Hofsass, Jeffery A.
• Assistant Examiner(s): Wolinsky, Scott
• Application Number:
  US08/363,720
• Time in Patent Office: 382 Days
• Field of Search: 379/202, 379/201, 379/207, 379/67, 379/88, 379/89, 370/62, 370/110.1, 348/14, 348/16
• 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 3/487 Arrangements for providing information services, e.g. recorded voice services or time announcements
• CPC Class Codes: H04M 3/493 Interactive information services, e.g. directory enquiries ; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals
• CPC Class Codes: H04M 3/527 Centralised call answering arrangements not requiring operator intervention
• 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
• CPC Class Codes: H04M 3/565 relating to time schedule aspects
• CPC Class Codes: Y10S 379/903 Password

Abstract

A teleconferencing system having screened introductions, named introductions, roll call, talker identification, and subconferencing, scheduling, and recording options. A caller attempting to join a teleconference is prompted to enter identification information by generating corresponding DTMF signals. The caller'"'"'s identification is used to index the caller'"'"'s profile stored in memory. The profile includes a memory address pointer to the location at which data representative of the spoken name of the caller is stored. The caller'"'"'s identification is also checked against a list specified by the meeting organizer and stored in memory to determine whether the caller is to be admitted to the teleconference. If the caller is to be admitted to the teleconference, an announcement is generated to the attendees of the teleconference using the caller'"'"'s spoken name retrieved from memory. Likewise, when the attendee leaves the conference, the system detects the attendee disconnecting and retrieves the attendee'"'"'s spoken name stored in memory in order to generate an announcement to the attendees: "XYZ has left the conference." The system is responsive to requests by attendees during the teleconference. The attendees communicate with the system by depressing buttons on their touch tone phones which generate DTMF signals. The system also has the capability of scheduling new conferences and automatically checking for any conflicts.

Claims

1. A teleconferencing system that uses voice processing to connect callers to teleconferences and guide callers through teleconferencing functions without operator intervention comprising:

a memory comprising teleconference information which identifies a teleconference to be held, and a name database comprising a spoken name of at least one caller to the teleconference, said spoken name indexed by a caller'"'"'s identification;

a switching matrix for selectively connecting telephone trunk lines, to which callers to the teleconference are coupled, for receipt of incoming voice signals from the telephone trunk lines to which callers to the teleconference are coupled and output of voice signals to the telephone trunk lines to which callers to the teleconference are coupled;

a plurality of digital signal processors (DSPs) coupled to said switching matrix for mixing a plurality of audio signals received on said trunk lines to provide teleconferencing among a plurality of callers, wherein the plurality of callers teleconferenced become teleconference attendees;

a system controller coupled to the memory and the switching matrix, said controller generating audio prompts to the callers and to the attendees to guide the callers and attendees in the operation of the teleconferencing system, one of said audio prompts requesting a caller'"'"'s identification to be entered prior to be admitted to a teleconference, and, in response to an entered caller'"'"'s identification, said controller retrieving the spoken name from the memory indexed by the caller'"'"'s identification and generating an announcement to the attendees of the teleconference using the retrieved spoken name, said announcement announcing that the caller is to join the conference, said switching matrix causing the announcement to be output on the trunk lines such that the attendees receive the announcement.

2. The teleconferencing system of claim 1, wherein said memory further comprises a teleconferencing list that identifies attendees to the teleconference, and said controller, responsive to a DTMF signal initiated by one of said attendees, reading the teleconferencing list to determine the caller identification of each of the attendees, retrieving the spoken name of each of the attendees from the name database based upon the caller identification, and announcing to the attendee a roll call playing the spoken name of each of the attendees of said teleconference.

3. The teleconferencing system of claim 1, wherein said memory further comprises a teleconferencing list that identifies attendees to the teleconference, said system controller, prior to said caller being connected to said teleconference to become an attendee, and responsive to a DTMF signal initiated by the caller, reads the teleconferencing list to determine the caller identification of each of the attendees, retrieves the spoken name of each of the attendees from the name database and generates an announcement to the caller comprising a roll call playing the spoken name of each of the attendees of said teleconference.

4. The teleconferencing system of claim 1, wherein said memory further comprises a teleconferencing list that identifies attendees to the teleconference, said system controller detecting when one of said attendees disconnects from said teleconference, reading the teleconferencing list to determine the caller identification of the disconnected attendee, retrieving the spoken name of the disconnected attendee, and announcing to attendees remaining in said teleconference the identity of said disconnected attendee.

5. The teleconferencing system of claim 4, wherein announcement of the disconnected attendee is selectively enabled.

6. The teleconferencing system of claim 1, wherein announcement of callers connecting to the teleconference is selectively enabled.

7. The teleconferencing system of claim 1, wherein said system controller, responsive to a DTMF signal generated by an attendee, determines which of said attendees is currently speaking, retrieves the spoken name of the attendee from the name database and generates an announcement providing the spoken name of the attendee who is currently speaking.

8. The teleconferencing system of claim 1, wherein said system controller generates audio prompts to a teleconference organizer to prompt the teleconference organizer to enter teleconference information regarding a teleconference to be scheduled, said system controller causing the teleconference information entered to be stored in the memory.

9. The teleconferencing system of claim 8, wherein said system controller further prompts the teleconference organizer to specify if the teleconference is to be recorded.

10. The teleconferencing system of claim 8, wherein said system controller further prompts the teleconference organizer to speak a meeting name, said system storing the meeting name in memory, wherein the system can generate an announcement of the meeting name to a caller to confirm joining a teleconference.

11. The teleconferencing system of claim 8, wherein said system controller prompts the teleconference organizer to enter a password corresponding to said teleconference to be scheduled, said system controller connecting callers to the scheduled teleconference after the callers enter said password.

12. The teleconferencing system of claim 8, wherein said system controller prompts the teleconference organizer to provide a start time and end time of the teleconference to be scheduled.

13. The teleconferencing system of claim 8, wherein said system controller further prompts the teleconference organizer to specify which of said attendees are allowed to speak and be heard by the other attendees.

14. The teleconferencing system of claim 8, wherein said system prompts said teleconference organizer for an agenda of the teleconference, said system controller, responsive to a subsequent DTMF signal entered by a requesting caller or a requesting attendee, generates an announcement to the requesting caller or requesting attendee comprising the agenda.

15. The teleconferencing system of claim 1 wherein said system controller prompts a conference attendee to enter a DTMF signal to lock said teleconference, wherein subsequent callers are not connected to said teleconference once said teleconference is locked.

16. The teleconferencing system of claim 15, wherein if the teleconference is locked, and a subsequent caller wishes to join the teleconference, said system controller generates an audio prompt to the conference attendees that the subsequent caller wishes to join the teleconference and to enter a DTMF signal to indicate whether to permit the caller to join the teleconference, wherein the conference attendees can select whether to permit the subsequent caller to join the teleconference.

17. The teleconferencing system of claim 1, wherein the memory further comprises audio data of a spoken meeting name, said system in response to a caller entering in a meeting identification, generating an announcement using the spoken meeting name to confirm to a caller that a valid meeting identification has been entered.

18. The teleconferencing system of claim 1, wherein said system controller, responsive to a DTMF signal entered by a requesting attendee, disconnects a last conference attendee to join the teleconference.

19. The teleconferencing system of claim 1, wherein if said caller'"'"'s identification is not found in the name database said caller is identified as a guest, said system controller generating audio prompts to prompt the guest to speak his name;

the system controller storing the spoken name of the guest temporarily in memory for retrieval during the teleconference.

20. The teleconferencing system of claim 1, wherein said system controller generates, a predetermined amount of time prior to an end time of the teleconference, an audio prompt to said attendees comprising a warning that the teleconference will end at the expiration of the predetermined amount of time.

21. The teleconferencing system of claim 1, said system controller, responsive to a DTMF signal generated by one of said attendees, initiating recording of said teleconference for storage in said memory.

22. The teleconferencing system of claim 1, said system controller, responsive to a DTMF signal generated by a requesting attendee, instructing said switching matrix and DSPs to temporarily disconnect the requesting attendee from the teleconference, and permitting said requesting attendee to call an outside party, said system controller, responsive to a second DTMF signal generated by the requesting attendee subsequent to being temporarily disconnected from the teleconference, rejoining said requesting attendee and said outside party to the teleconference.

23. The teleconferencing system as set forth in claim 1, wherein said DSPs further compresses voice data of the spoken name to be stored in the memory and decompresses the spoken name retrieved from the memory.

24. A teleconferencing system, comprising:

line cards connected to telephone trunk lines, signals representative of callers to a teleconference coming to said system over said telephone trunk lines;

a switching matrix coupled to the line cards for selectively connecting callers such that the connected callers are attendees of the teleconference and the attendees can audibly communicate with each other in real-time;

a plurality of digital signal processors (DSPs) coupled to said switching matrix for mixing voice signals of attendees such that the attendees hear the mixed signals, said DSPs further detecting DTMF signals on said trunk lines;

a memory for storing pre-recorded audio prompts;

a system controller coupled to the memory, line cards, switching matrix and DSPs, said system controller controlling the switching matrix, DSPs and line cards to establish a teleconference, said system controller responsive to predetermined DTMF signals detected by the DSPs to cause the switching matrix, line cards and DSPs to initiate a subconference between a subset of attendees of the teleconference, and said system controller retrieving pre-recorded prompts for playback to the attendees for prompting the attendees to move between said teleconference and said subconference.

25. The teleconferencing system of claim 24, wherein a plurality of subconferences are conducted during said teleconference, said DSPs mixing voice signals of subconference attendees of each subconference to provide subconferenced mixed signals to subconference attendees.

26. The teleconferencing system of claim 25, wherein said system controller assigns a subconference number and an attendee enters DTMF signals representative of said subconference number to join the subconference, said system controller responsive to the DTMF signals causing the attendee to join the subconference.

27. The teleconferencing system of claim 24, wherein said subconference attendees are rejoined with said teleconference when said subconference is terminated.

28. The teleconferencing system of claim 24, wherein said system controller prompts an attendee for a password before access to said subconference is granted.

29. The teleconferencing system of claim 24, wherein said voice subsystem responsive to a first DTMF signal announces a roll call identifying each attendee of said subconference.

30. The teleconferencing system of claim 24, wherein said system controller generates an announcement identifying each attendee who joins said subconference.

31. The teleconferencing system of claim 24, wherein said voice subsystem announces an identity of each attendee who leaves said subconference.

32. The teleconferencing system of claim 24 wherein said system controller further comprises a means for locking said subconference to deny access of subsequent attendees to said subconference.

33. The teleconferencing system of claim 32, wherein if the subconference is locked, and a subsequent attendee wishes to join the subconference, said system controller generates an audio prompt to the subconference attendees that the subsequent attendee wishes to join the subconference and to enter a DTMF signal to indicate whether to permit the subsequent attendee to join the subconference, wherein the conference attendees can select whether to permit the subsequent attendee to join the subconference.

34. The teleconferencing system of claim 24, wherein said system controller further comprising a means for detecting which of said attendees of said subconference is currently speaking and announcing the identity of that attendee.

35. The teleconferencing system of claim 24, wherein said system controller generates voice prompts to prompt a subconference organizer to identify certain subconference attendees that are prohibited from being heard by other subconference attendees.

36. The teleconferencing system of claim 24, said system controller further comprising a means responsive to a DTMF signal to initiate recording of said subconference, said recording stored in the memory.

37. The teleconferencing system of claim 24, said system controller, responsive to a DTMF signal indicating that a requesting subconference attendee is to temporarily disconnect from said subconference, controlling a line card to seize a trunk line and cause the line to go off hook, controlling the switching matrix to switch the trunk line connected to said requesting subconference attendee to be connected to the seized trunk line wherein said requesting subconference attendee can dial and connect to an outside party, said system controller, responsive to a subsequent DTMF signal, controlling the switching matrix and DSPs to enable the requesting subconference attendee to subsequently rejoin said subconference with said outside party.

38. In a teleconferencing system having a switching matrix for selectively connecting trunk lines, a processor for processing a plurality of audio signals on said trunk lines to provide conferencing among a plurality of attendees to a teleconference, and a voice subsystem for playing pre-recorded prompts, a method of processing telephone calls comprising the steps of:

storing voice data of a spoken name of at least one caller;

generating a caller profile database, said caller profile database comprising at least one caller profile of the caller comprising caller identification and a memory address pointer to the voice data representative of a spoken name of the caller;

detecting an incoming telephone call by the caller to said teleconferencing system;

prompting for an identification of the caller;

using said identification, retrieving the memory address pointer from the caller profile database;

retrieving the spoken name of the caller from memory;

generating an audio announcement that the caller is to join the teleconference to the attendees of the teleconference, said announcement including the spoken name of the caller retrieved from memory; and

joining the caller to the teleconference.

39. The method of claim 38 further comprising the steps of:

detecting a first DTMF signal generated;

determining the attendees to the teleconference;

retrieving the spoken name of each attendee from memory; and

generating a roll call consisting of the spoken name of each attendee of said conference.

40. The method of claim 38, wherein said DTMF step is generated by a caller prior to joining the teleconference, and said step of generating a roll call comprises playing the roll call to the caller.

41. The method of claim 38, further comprising the steps of:

detecting when an attendee leaves the teleconference;

determining the caller identification of the attendee leaving the teleconference;

using said identification, retrieving the memory address pointer from the caller profile database;

retrieving the spoken name of the attendee from memory;

generating an audio announcement that an attendee is leaving the teleconference, said announcement including the spoken name of the attendee retrieved from memory.

42. The method of claim 38 further comprising the steps of:

detecting the generation of a predetermined DTMF signal;

determining an attendee who is currently talking;

generating an announcement of an identity of said attendee who is currently talking.

43. The method of claim 38 further comprising the steps of:

prompting a teleconference organizer to record an agenda of the teleconference;

detecting the generation of a predetermined DTMF signal by the caller; and

announcing said agenda to said caller.

44. The method of claim 38 further comprising the steps of:

prompting a teleconference organizer to input the spoken meeting name;

storing the spoken meeting name in memory; and

in response to a caller entering in a meeting identification, generating an announcement comprising the spoken meeting name to confirm to a caller that a valid meeting identification has been entered.

45. The method of claim 38 further comprising the steps of:

prompting a teleconference organizer to enter a password to access the teleconference;

entering a password corresponding to said conference;

prompting said caller to enter said password;

admitting said caller to said conference if said entered password is valid; and

denying access of said caller to said conference if said entered password is invalid.

46. The method of claim 38 further comprising the steps of:

detecting the generation of a predetermined DTMF signal by a teleconference attendee;

locking said teleconference such that access to said teleconference is denied to all subsequent callers.

47. The method of claim 46, wherein if the teleconference is locked and a subsequent caller wishes to join the teleconference, said method further comprising the steps of:

generating an audio prompt to the attendees that the subsequent caller wishes to join the teleconference;

said attendees entering a DTMF signal to indicate whether to permit the subsequent caller to join the teleconference;

joining the subsequent caller to the teleconference if the attendee enters a DTMF signal indicating that the subsequent caller can join the teleconference.

48. The method of claim 38, further comprising the step of, responsive to a predetermined DTMF signal generated by a conference attendee, disconnecting a last conference attendee to join the teleconference.

49. The method of claim 38 further comprising the steps of:

prompting a teleconference organizer to specify attendees that have listen only access to the teleconference;

specifying which of said attendees are to have listen only access; and

prohibiting attendees that have listen only access from being heard by other attendees of said teleconference.

50. The method of claim 38 further comprising the step of generating an audio announcement to attendees of the teleconference that said teleconference is to end within a specified amount of time.

51. The method of claim 38 further comprising the steps of:

detecting the generation of a predetermined DTMF signal;

recording said teleconference in memory.

52. The method of claim 38 further comprising the steps of:

detecting the generation of a predetermined DTMF signal by a requesting attendee;

temporarily disconnecting the requesting attendee from said teleconference;

connecting the requesting attendee to an off-hook trunk line thereby permitting the requesting attendee to dial and connect to an outside party; and

responsive to a second certain DTMF signal, rejoining said requesting attendee and said outside party to said teleconference.

53. The method of claim 38, wherein the caller identification is not found in the caller profile database, said method further comprising the steps of:

prompting for the caller to speak his name;

storing temporarily in memory voice data of the spoken name of the caller; and

generating an audio announcement that the caller is to join the teleconference to the attendees of the teleconference, said announcement including the spoken name of the caller stored in memory.

54. In teleconferencing system comprising teleconferencing resources, and a memory comprising voice prompts, a method of scheduling a teleconference utilizing voice prompts stored in the memory, comprising the steps of:

providing a scheduling database comprising teleconferencing resource information, the teleconferencing system resources operating based upon the scheduling database;

retrieving voice prompts from the memory to prompt a caller to enter schedule information pertaining to said teleconference, said teleconferencing system conducting said teleconference according to said schedule information if resources are available;

determining whether said teleconferencing system has resources available to handle said teleconference by comparing said schedule information entered by said caller to the scheduling database;

if said resources are not available to handle said teleconference according to said schedule information entered by said caller;

a) generating an announcement informing said caller that said teleconference cannot be scheduled according to said schedule information; and

b) prompting said caller to modify said schedule information;

if said resources are available;

c) confirming to said caller that said teleconference is scheduled;

d) assigning a conference number;

e) storing said schedule information in said schedule database.

55. The method of claim 54, wherein said prompting step is comprised of the steps of:

prompting said caller for a time of said teleconference;

prompting said caller for a number of attendees of said teleconference; and

prompting said caller for features to be enabled during said teleconference.

56. The method of claim 54, wherein the step of prompting comprises the step prompting the caller to indicate if the teleconference is to be recorded.

57. The method of claim 54 wherein if said resources are not available, said method further comprising the step of said teleconferencing system suggesting an alternative schedule based upon available resources determined from the scheduling database.

58. The method of claim 54 further comprising the step of modifying said schedule information stored in said scheduling database if said caller enters said conference number and elects to change said schedule information.

59. The method of claim 54, wherein the step of prompting comprises the step of prompting the caller to record the meeting name.

60. The method of claim 54, further comprising the step of conducting a scheduled teleconference according to the resource information in the scheduling database, said step comprising the steps of:

prompting a caller to said teleconference to identify said teleconference by entering the teleconference number;

detecting DTMF tones representative of the teleconference number;

determining whether the meeting is locked;

connecting said caller to said teleconference if said caller entered said teleconference identification and said meeting is not locked.