Method and apparatus for conversing over a network

• US 5,572,677 A
• Filed: 08/04/1994
• Issued: 11/05/1996
• Est. Priority Date: 08/04/1994
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Information Systems Incorporated (Canon Inc.)
• Inventors: Luther, Willis J., Fontana, James A.
• Primary Examiner(s): Shin, Christopher B.
• Application Number:
  US08/285,521
• Time in Patent Office: 824 Days
• Field of Search: 395/200, 395/200.01-200.09, 395/200.1, 395/200.11-200.19, 395/200.2, 395/200.21, 395/600, 395/650, 379/88, 379/53, 364/514, 370/62
• US Class Current: 709/206
• CPC Class Codes: H04L 12/28 characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] wireless communication networks H04W ; arrangements for dividing the transmission path H04W40/00
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 2012/6429 Terminal adapters
• CPC Class Codes: H04L 2012/6435 Bus
• CPC Class Codes: H04L 2012/6481 Speech, voice

Abstract

A network sound channel which permits voice communication over a local area network (LAN). Plural workstations are connected via respective connection nodes to the LAN. Each workstation includes a sound processor for converting sound into digital information and digital information into sound, and each workstation is operable in (a) a talk mode in which the sound processor converts sound into digital information and the digital information is stored in the storage over the LAN, and (b) a listen mode in which digital information is retrieved from the storage over the LAN and the sound processor converts the digital information into sound.

Claims

1. A network sound channel comprising:

a local area network (LAN) having a plurality of connection nodes for connecting computer devices and including storage means for storing digital information transmitted over said LAN; and

plural computer devices connected via respective connection nodes to said LAN, each computer device including a sound processor for converting sound into digital information and digital information into sound, each computer device being operable in (a) a talk mode in which the computer device attempts to grab a network semaphore from the storage means and in which, only if the device grabs the semaphore, the sound processor converts sound into digital information and the digital information is stored in said storage means over said LAN in serialized files having a predetermined naming convention, and (b) a listen mode in which, if certain serialized files having a predetermined naming convention are in said storage means, said certain serialized files are retrieved from said storage means over said LAN, transferred to a local memory and converted by the sound processor into sound in accordance with their serialization.

2. A network sound channel according to claim 1, wherein said storage means comprises a file server.

3. A network sound channel according to claim 2, wherein said file server includes a predetermined amount of file space reserved based on a number of computer devices connected to said LAN.

4. A network sound channel according to claim 3, wherein the predetermined amount of file space includes a beginning and an end and the digital information is written circularly into the file space from the beginning through to the end and then from the beginning again.

5. A network sound channel according to claim 1, wherein when operating in the talk mode, sound is divided into utterances for conversion into digital information, files having a predetermined length are created using the digital information, and the files are transferred over said LAN to be stored in said storage means.

6. A network sound channel according to claim 5, wherein the files are transferred at predetermined time intervals over said LAN to be stored by said storage means.

7. A network sound channel according to claim 5, wherein the files are stored in said storage means together with an utterance serial number, a file name and a time tag indicating a present real time.

8. A network sound channel according to claim 7, wherein in the listen mode the utterance serial number, the file name and the time tag are retrieved from said storage means over said LAN.

9. A network sound channel according to claim 8, wherein the retrieved utterance serial number is compared with a stored utterance serial number and if the retrieved utterance serial number is greater than the stored utterance serial number the corresponding files are retrieved.

10. A network sound channel according to claim 8, wherein the retrieved time tag is compared with a time generated by a real time clock and a rate at which the information is retrieved from said storage means is determined accordingly.

11. A network sound channel according to claim 1,

wherein, when certain serialized files are converted into sound, the computer device displays a lag time which indicates how long ago the certain serialized files were stored in said storage means.

12. A network sound channel according to claim 11, further comprising:

a speed control for controlling a speed at which the certain serialized files are retrieved from said storage means, transferred to a local memory, and converted into sound.

13. A local area network (LAN) comprising:

file means for storing digital files;

plural computer devices connected via respective connection nodes to said LAN, each computer device including a sound processor for converting sound into digital information and digital information into sound, each computer device being operable in a first mode in which the computer device attempts to grab a network semaphore from the file means and in which, only if the device grabs the semaphore, the sound processor converts sound into digital information, and a second mode in which the sound processor converts digital information into sound,

wherein when one of said computer devices is operating in the first mode, an information processor transfers the digital information converted by said sound processor over said LAN to be stored in said file means in serialized files having a predetermined naming convention and each other of said computer devices which are operating in the second mode retrieves the serialized files, transfers the serialized files to a local memory, and converts the digital information in the serialized files into sound in accordance with their serialization.

14. A local area network according to claim 13,

wherein, when digital information in the serialized files is converted into sound, the computer device displays a lag time which indicates how long ago the serialized files were stored in said file means.

15. A local area network according to claim 14, further comprising:

a speed control for controlling a speed at which the serialized files are retrieved from said file means, transferred to a local memory, and converted into sound.

16. Programmed computer equipment for communicating over a local area network using a file server, said computer equipment comprising:

a sound processor for converting sound into digital information and digital information into sound;

a memory for storing programs used for performing computer implemented steps and for storing sound files; and

a computer processor for performing the computer implemented steps using the stored programs, the computer implemented steps comprising steps for operating the computer equipment in (a) a talk mode in which the computer equipment attempts to grab a network semaphore from the file server and in which, only if the device grabs the semaphore, the sound processor converts sound into digital information and the digital information is stored in the file server in serialized files having a predetermined naming convention, and (b) a listen mode in which, if certain serialized files having a predetermined naming convention are in the file server, said certain serialized files are retrieved from the file server over the LAN, transferred to a local memory and converted by the sound processor into sound in accordance with their serialization.

17. Programmed computer equipment according to claim 16,

wherein, when certain serialized files are converted into sound, the computer equipment displays a lag time which indicates how long the certain serialized files have been in the file server.

18. Programmed computer equipment according to claim 17, further comprising:

a speed control for controlling a speed at which the certain serialized files are retrieved from the file server, transferred to a local memory, and converted into sound.

19. Programmed computer equipment connected to a local area network (LAN) including a file server for performing voice communication between a plurality of programmed computer equipment, each said programmed computer equipment comprising:

a sound processor for converting sound into digital information and digital information into sound;

a memory for storing computer code used for performing computer implemented steps using the stored computer code, the computer implemented steps comprising steps for operating said processor in a talk mode and in a listen mode,

wherein the computer code includes code for a talk mode to (1) determine by reference to whether a semaphore can be grabbed if another computer equipment is storing sound files in the file server, (2) convert sound into digital data using the sound processor if no other computer equipment is storing sound files in the file server, (3) create files using the digital data, and (4) transmit the files over the LAN to the file server; and

includes code for a listen mode to (5) search sound files stored on the file server for a sound file named in accordance with a predetermined naming convention, (6) retrieve files from the file server if it is determined that a file named in accordance with a predetermined naming convention exists to be listened to, and (7) convert the retrieved files into sound using the sound processor.

20. Programmed computer equipment according to claim 19,

wherein the computer code includes code to display a lag time which indicates how long the retrieved files have been in the file server.

21. Programmed computer equipment according to claim 20, further comprising:

a speed control for controlling a speed at which the files are retrieved from the file server and converted into sound.