Selective transmission of encoded voice information representing silence

• US 5,220,565 A
• Filed: 05/30/1991
• Issued: 06/15/1993
• Est. Priority Date: 05/30/1991
• Status: Expired due to Term

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Moreno, Christopher P., Newberg, Donald G., Wilson, Alan L.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): MARCELO, MELVIN C
• Application Number:
  US07/706,910
• Time in Patent Office: 747 Days
• Field of Search: 370/94.1, 370/99, 370/110.1, 370/80, 370/81, 370/60, 455/63
• US Class Current: 370/349
• CPC Class Codes: H03G 3/344 Muting responsive to the amount of noise (noise squelch) H03G3/345 takes precedence

Abstract

Discrete packets (306) containing encoded voice information are transmitted within frames (301 and 302) in a repetitive manner until all voice information has been sent. Following transmission of all packets containing such voice information, at least a predetermined number of additional packets (401) are then transmitted, which additional packets represent silence. Following this, a disconnect signal (304) is transmitted. So configured, loss of the disconnect signal due to fading or other communication pathway disturbances will not necessarily lead to audibilization of undesired sounds, as the decoding protocol at the receiver (200) provides for reprocessing of recently received packet information in the absence of newly available reliable information. Hence, the silence information is continually reprocessed until either reliable information is again available or a time out sequence concludes.

Claims

1. A method of transmitting an audible message in discrete packets, comprising the steps of:

A) providing a message to be transmitted;

B) packetizing the message in discrete packets;

C) transmitting the discrete packets;

D) for each and every audible message so transmitted, upon transmitting all of the discrete packets, automatically transmitting at least one additional packet representing silence.

2. The method of claim 1, and further including the step of:

E) transmitting a disconnect signal.

3. The method of claim 1, wherein the step of transmitting the discrete packets includes the step of transmitting the discrete packets using a radio communication link.

4. The method of claim 1, wherein the step of providing a message to be transmitted includes the step of providing a voiced message.

5. The method of claim 1, wherein the step of transmitting the discrete packets includes the step of transmitting a plurality of the discrete packets in a data frame.

6. The method of claim 5, wherein the step of transmitting the discrete packets further includes the step of transmitting additional pluralities of the discrete packets in additional data frames.

7. A method of transmitting an audible message in discrete packets, comprising the steps of:

A) providing a voiced message to be transmitted;

B) digitizing the voiced message to provide a digitized voiced message;

C) sampling and processing the digitized voiced message to provide a plurality of discrete packets;

D) transmitting the discrete packets;

E) for each and every voiced message so transmitted, upon concluding transmission of the discrete packets, automatically transmitting at least one additional packet representing silence.

8. The method of claim 7, wherein the step of sampling and processing the digitized voiced message to provide a plurality of discrete packets includes the step of processing the digitized voiced message pursuant to a particular encoding methodology.

9. The method of claim 8, wherein the step of transmitting at least one additional packet representing silence includes the step of providing at least one additional packet containing information that represents silence when decoded in accordance with the particular encoding methodology.

10. The method of claim 7, and further including the step of:

F) transmitting a disconnect signal.

11. The method of claim 7, wherein the step of transmitting at least one additional packet representing silence includes the step of transmitting at least two additional packets representing silence.

12. The method of claim 7, wherein the step of transmitting the discrete packets includes the step of:

D1) providing a frame protocol;

D2) transmitting no more than a predetermined number of the discrete packets for each frame in the frame protocol.

13. The method of claim 12, wherein the step of transmitting at least one additional packet representing silence includes the step of transmitting at least a predetermined plurality of additional packets representing silence.

14. The method of claim 13, wherein the step of transmitting at least a predetermined plurality of additional packets representing silence includes the step of transmitting at least one additional frame in the frame protocol as necessary to accommodate transmission of the predetermined plurality of additional packets representing silence.

15. A radio, comprising:

A) input means for receiving a voiced message to be transmitted;

B) digitizing means operably coupled to the input means for digitizing the voiced message;

C) processing means operably coupled to the digitizing means for sampling and processing the digitized voice message pursuant to a particular voice encoding methodology to provide a plurality of discrete packets;

D) transmission means operably coupled to the processing means for transmitting the plurality of discrete packets;

E) control means operably coupled to the input means, the processing means, and the transmission means, for sensing conclusion of the voiced message, and for each and every voiced message so transmitted, causing a predetermined number of additional discrete packets to be transmitted following conclusion of transmission of the plurality of discrete packets, which additional discrete packets represent silence.

16. The radio of claim 15, wherein the control means further functions to cause transmission of a disconnect signal following transmission of the additional discrete packets.

17. The radio of claim 15, wherein the additional discrete packets include at least one such additional discrete packet.

18. The radio of claim 16, wherein the additional discrete packets includes at least two such additional discrete packets.