Radio functions due to voice compression

• US 5,170,490 A
• Filed: 09/28/1990
• Issued: 12/08/1992
• Est. Priority Date: 09/28/1990
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Cannon, Gregory L., O'Connor, James M., Laird, Kevin M.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): KEOUGH, TIMOTHY
• Application Number:
  US07/589,360
• Time in Patent Office: 802 Days
• Field of Search: 455/72, 455/84, 455/343, 370/109, 370/111, 370/76, 381/34, 381/35, 381/30, 381/31, 395/2
• US Class Current: 455/72
• CPC Class Codes: H04B 1/40 Circuits

Abstract

A method of voice communication is provided to avoid disruption in the received voice signal. A compressed voice signal is received occupying 100% of the audio time during a lesser percentage (352) of the radio frequency (RF) time (302). An informational signal is also received during at least a portion of a remainder (354) of the RF time. Scanning for another channel, receiving data or embedded control signals may occur during at least a portion of the remainder (354) of the RF time saved.

Claims

1. A method of voice communication on a radio channel having a frame arranged into a voice subframe and a signalling subframe, the method comprising the steps of:

receiving a compressed voice signal during said voice subframe;

receiving an informational signal during said signalling subframe without audio degradation of a radio receiving said signals; and

determining whether to disregard a portion of said information signal for performing an operation of said radio instead of receiving said portion of said information signal during at least said portion of said signalling subframe, wherein said performing of said operation step comprises scanning for a signal on another frequency during at least said portion of said signalling subframe.

2. The method of claim 1 wherein said receiving of said compressed voice signal step comprises receiving on said channel said compressed voice signal during a fraction of a radio frequency (RF) transmission air time to provide a continuously audible voice signal.

3. The method of claim 1 wherein said performing of said operation step comprises scanning for another compressed voice signal on another frequency during at least said portion of said signalling subframe.

4. The method of claim 1 wherein said receiving of said informational signal step comprises receiving signalling data.

5. The method of claim 1 wherein said receiving of said informational signal step comprises receiving synchronization signals.

6. A method of monitoring one or more radio channels operable in a timing frame arranged into voice subframes and signalling subframes, the method comprising the steps of:

receiving a voice-compressed signal on a first channel during a voice subframe;

receiving signalling data upon the termination of said received voice-compressed signal during a signalling subframe; and

sampling another channel for a sampling period for another signal during at least a portion of another signalling subframe without audio disruption in said received voice-compressed signal.

7. The method of claim 6 further comprising the step of:

signalling an operator when said another signal is detected on a second channel, while continuing audio reproduction of said voice-compressed signal.

8. A method of communication on a radio channel arranged into voice and signalling subframes, the method comprising:

receiving a carrier wave modulated in a first manner by signalling data during a signalling subframe;

receiving said carrier wave modulated in said first manner by a voice-compressed signal during a voice subframe; and

receiving said carrier wave modulated in a second manner by an informational signal during at least a portion of another signalling subframe without audio disruption in audio reproduction of said received voice signal.

9. The method of claim 8 wherein said first modulation manner is a different method of modulation than said first manner.

10. The method of claim 8 further comprising the step of determining whether to a portion of said informational signal.

11. The method of claim 10 further comprises transmitting said carrier wave modulated in said second manner by data during at least said portion of said signalling subframe without audio disruption in audio reproduction of said received voice signal in response to disregarding said portion of said informational signal.

12. A method of voice communication on a radio channel having a frame arranged into a voice subframe and a signalling subframe, the method comprising the steps of:

receiving a compressed voice signal on a first frequency during said voice subframe; and

transmitting an informational signal on a second frequency during at least a portion of said signalling subframe without audio degradation at said first frequency.

13. A method of voice communication on a radio channel having a frame arranged into a voice subframe and a signalling subframe, the method comprising the steps of:

in a radio;

receiving in a receiver a compressed voice signal during a voice subframe;

saving voice information from said received compressed voice signal in a receive buffer;

receiving synchronization data during a signalling subframe;

retrieving voice information from said receive buffer for reproducing sound of said received voice signal during said voice subframe and said signalling subframe;

determining whether to disregard at least a portion of said synchronization data; and

powering down said receiver during at least said portion of said signalling subframe to extend battery life of said radio without audio degradation in sound reproduction of said received voice signal from said retrieved voice information.

14. A method of voice communication on a radio channel having a frame arranged into a voice subframe and a signalling subframe, the method comprising the steps of:

transmitting to a first receiver on a first frequency a compressed voice signal during said voice subframe; and

transmitting to a second receiver on a second frequency an informational signal during at least a portion of said signalling subframe without audio degradation at said first receiver.