Logging recorder system for trunking radio

• US 5,625,890 A
• Filed: 11/27/1995
• Issued: 04/29/1997
• Est. Priority Date: 06/29/1993
• Status: Expired due to Term

• Current Assignee: Swift Computers Inc.
• Original Assignee: Swift Computers Inc.
• Inventors: Swift, Carl J.
• Primary Examiner(s): Pham, Chi H.
• Application Number:
  US08/562,643
• Time in Patent Office: 519 Days
• Field of Search: 455/9, 455/18, 455/53.1, 455/54.1, 455/56.1, 455/67.1, 455/67.7, 340/825.06, 300/32, 369/6, 369/7, 369/48, 369/49, 369/61, 369/98, 379/45, 379/73, 379/84, 379/85
• US Class Current: 455/67.11
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

A logging recorder system for trunking radio includes a device which monitors a plurality of channels of the trunking radio system and outputs analog signals representative thereof. A digitizer is then provided for digitizing the analog signals, and a controller breaks the digitized signals into segments and stores the segments on a mass storage device. The controller also generates an index of locations of the segments on the mass storage device. The controller may then be used to selectively play back a desired conversation by automatically combining segments from the mass storage device based on the index.

Claims

1. A logging recorder for a trunking radio system having a plurality of channels, wherein one of said channels carries channel assignment information and each of the others of said channels for carrying streams of segments from unrelated conversations, comprising:

a plurality of fixed frequency radios each of which monitors a selected one of said plurality of channels;

a controller which monitors said fixed frequency radios and generates identification information corresponding to said segments for each particular conversation based upon said channel assignment information; and

means for storing said segments and said identification information on a mass storage device.

2. A logging recorder as claimed in claim 1, further comprising means for playing back a desired conversation by automatically retrieving and combining appropriate ones of said segments based upon said identification information.

3. A logging recorder as claimed in claim 1, further comprising means for digitizing selected outputs of said fixed frequency radios.

4. A logging recorder as claimed in claim 3, further comprising means for compressing the digitized selected outputs.

5. A logging recorder as claimed in claim 1, wherein said identification information is appended to a corresponding one of said segments prior to storage.

6. A logging recorder as claimed in claim 1, wherein said identification information comprises a channel identifier.

7. A logging recorder as claimed in claim 1, wherein said identification information comprises a user identifier.

8. A logging recorder as claimed in claim 1, wherein said identification information comprises a talk group identifier.

9. A logging recorder as claimed in claim 1, wherein said identification information comprises a time identifier.

10. A logging recorder as claimed in claim 1, wherein said identification information comprises a channel identifier, a talk group identifier, and a time identifier.

11. A logging recorder as claimed in claim 5, wherein said identification information comprises a channel identifier.

12. A logging recorder as claimed in claim 5, wherein said identification information comprises a user identifier.

13. A logging recorder as claimed in claim 5, wherein said identification information comprises a talk group identifier.

14. A logging recorder as claimed in claim 5, wherein said identification information comprises a time identifier.

15. A logging recorder as claimed in claim 5, wherein said identification information comprises a channel identifier, a talk group identifier, and a time identifier.

16. A logging recorder as claimed in claim 1, wherein said mass storage device comprises a hard drive.

17. A logging recorder as claimed in claim 1, wherein said mass storage device comprises magnetic tape.

18. A digital logging recorder for a trunking radio system having a plurality of channels, wherein one of said channels carries channel assignment information and each of the others of said channels is for carrying streams of segments from unrelated conversations, comprising:

means for monitoring the plurality of channels and outputting analog signals representative thereof;

means for digitizing selected ones of said analog signals;

control means for monitoring the digitized signals and generating identification information corresponding to said segments for each particular conversation based upon said channel assignment information; and

means for storing said segments and said identification information on a mass storage device.

19. A logging recorder as claimed in claim 18, further comprising means for playing back a desired conversation by automatically retrieving and combining appropriate ones of said segments based upon said identification information.

20. A method of logging a trunking radio system having a plurality of channels, wherein one of said channels carries channel assignment information and each of the others of said channels is for carrying streams of segments from unrelated conversations, comprising the steps of:

monitoring said plurality of channels;

generating identification information corresponding to said segments for each particular conversation based upon said channel assignment information; and

storing said segments and said identification information on a mass storage device.

21. The method of claim 20, further comprising the step of converting the segments to digital signals.

22. The method of claim 20, further comprising the step of appending said identification information to a corresponding one of said segments.