Method for minimizing message collision in a device

• US 8,340,256 B2
• Filed: 09/18/2008
• Issued: 12/25/2012
• Est. Priority Date: 03/03/2006
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Jorgensen, Niels Erik, Christoffersen, Michael
• Primary Examiner(s): Elahee, Md S
• Application Number:
  US12/212,797
• Publication Number:
  US 20090010403A1
• Time in Patent Office: 1,559 Days
• Field of Search: 379/88.23, 379 671- 69, 379/88.16, 379/88.22, 379/88.25, 379/93.08, 379/211.02, 455/503, 455/83, 455/18, 340/870.02, 704/502, 348/14.01, 370/237, 342/172
• US Class Current: 379/88.22
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• CPC Class Codes: H04L 65/765 intermediate
• CPC Class Codes: H04L 65/80 Responding to QoS

Abstract

A method for minimizing message collision in a device is presented. Two or more overlapping real-time streaming simplex audio messages are received. One of the audio messages is forwarded to be reproduced while the other is stored. Forwarding of the delayed audio message is delayed such that overlapping reproduction of the audio messages is minimized. Reproduction is delayed until a predetermined clock time expires or is dependent on one or more of: the length of the second audio message or the amount of overlap of the first and second audio messages.

Claims

1. A method for minimizing audio message collision in an audio reproducing device, the method comprising:

receiving, at the device, a plurality of real-time streaming simplex audio messages including at least a first audio message and a different second audio message that at least partially overlap in time;

forwarding, at the device, the first audio message to an audio reproduction component of the device for playback;

while forwarding the first audio message to the audio reproduction component, storing, at the device, at least an overlapping portion of the second audio message, wherein said overlapping portion is overlapped with the first audio message;

delaying forwarding, at the device, the stored overlapping portion of the second audio message to the audio reproduction component until at or after a selected time that is a function of at least one of;

an amount of time to pass from the start of forwarding of the first audio message, the length of the first audio message, the length of the second audio message, a size of a buffer for storing the second audio message, and the amount of overlap, in time, of the first and second audio messages; and

at or after the selected time, forwarding, at the device, the stored overlapping portion of the second audio message to the audio reproduction component for playback.

2. The method of claim 1, wherein the storing comprises storing at least a portion of the overlapping portion of the second audio message in the buffer until the buffer is filled.

3. The method of claim 2, further comprising, after the buffer is filled and additional overlapping portions of the second audio massage are received, forwarding both the first audio message and the stored overlapping portion of the second audio message to the audio reproduction component and automatically adjusting playback volumes of the first audio message and the stored overlapping portion of the second audio message to different levels.

4. The method of claim 3, wherein one of the first and second audio messages is a higher priority audio message and the other of the first and second audio messages is a lower priority audio message, the method further comprising setting the playback volume of the higher priority audio message of the first and second audio messages is louder than that of the lower priority audio message of the first and second audio messages during forwarding of the first audio message and the stored overlapping portion of the second audio messages to the audio reproduction component.

5. The method of claim 3, further comprising restoring an original playback volume of a remaining non-overlapping forwarding portion of one of the first and the second audio message during subsequent forwarding of the remaining non-overlapping forwarding portion to the audio reproduction component.

6. The method of claim 1, wherein the stored overlapping portion of the second audio messages is forwarded at an increased speed, relative to a speed at which the first audio message is forward, such that reproduction of the store overlapping portion of the second audio messages is speeded up.

7. The method of claim 1, wherein the second audio message is started to be received prior to starting to receive the first audio message, the forwarding of the first audio message to the audio reproduction component interrupting a prior forwarding of the second audio message to the audio reproduction component, the method further comprising:

storing the second audio message in its entirety, and re-forwarding the second audio message to the audio reproduction component in its entirety at or after forwarding of the interrupting first audio message is completed.

8. The method of claim 1, wherein the second audio message is started to be received prior to starting to receive the first audio message, the forwarding of the first audio message to the audio reproduction component interrupting a prior forwarding of the second audio message to the audio reproduction component, the method further comprising:

re-forwarding only a portion of the second audio message that was not yet forwarded to the audio reproduction component after the forwarding of the interrupting first audio message is completed.

9. The method of claim 1, wherein reproduction of the first and second audio messages at the audio reproduction component is temporally adjacent.

10. The method of claim 1, wherein a preset time delay is inserted between reproduction of the first and second audio messages such that reproduction of the first and second audio messages is separated in time and not temporally adjacent.

11. The method of claim 1, wherein the device is an emergency dispatch console.

12. The method of claim 1, wherein the stored overlapping portion of the second audio message is delay-forwarded to the audio reproduction component at the selected time calculated as a function of the length of the first audio message.

13. The method of claim 12, wherein the selected time follows the end of forwarding of the first message by a predetermined clock period.

14. The method of claim 13, wherein an audible signal is played back at the audio reproduction component during the predetermined clock period in order to indicate that a different message is about to be played back.

15. The method of claim 1, wherein the stored overlapping portion of the second audio message is delay-forwarded to the audio reproduction component at the selected time calculated as a function of the size of the buffer for storing the second audio message, and the amount of overlap, in time, of the first and second audio messages.

16. The method of claim 1, wherein the second audio message is delay-forwarded to the audio reproduction component at the earliest of (i) the selected time calculated as a function of the length of the first audio message, (ii) the predetermined clock time measured from the start of forwarding of the first audio message, and (iii) the selected time calculated as a function of the size of the buffer for storing the second audio message, and the amount of overlap, in time, of the first and second audio messages.

17. An audio reproducing device comprising:

a receiver configured to receive different real-time first and second simplex streaming audio messages that at least partially overlap in time;

a reproduction component configured to play back audio messages;

a buffer configured to store audio messages; and

a processor configured to;

forward the other of the first and second audio messages to the reproduction component for playback;

while forwarding the other of the first and second audio messages to the audio reproduction component, store, in the buffer, at least an overlapping portion of the one of the first and second audio messages that overlaps with the other of the one of the first and second audio messages;

delaying forwarding the stored overlapping portion of the one of the first and second audio messages to the reproduction component until at or after a selected time that is a function of at least one of;

an amount of time to pass from the start of forwarding of the other of the first and second audio messages, the length of the other of the first and second audio messages, the length of the one of the first and second audio messages, a size of the buffer for storing the one of the first and second audio messages, and the amount of overlap, in time, of the first and second audio messages; and

at or after the selected time, forward the stored overlapping portion of the second audio message to the audio reproduction component for playback.

18. The device of claim 17, wherein the device is an emergency dispatch console.

19. The device of claim 17, wherein the processor is further configured to, responsive to detecting that the buffer is filled and additional overlapping portions of the second audio message are received, forward both the first audio message and the stored overlapping portion of the second audio message to the audio reproduction component and automatically adjust playback volumes of the first audio message and the stored overlapping portion of the second audio message to different levels.

20. The device of claim 17, wherein the second audio message is started to be received prior to starting to receive the first audio message, the forwarding of the first audio message to the audio reproduction component interrupting a prior forwarding of the second audio message to the audio reproduction component, the processor further configured to:

store the second audio message in its entirety, and re-forward the second audio message to the audio reproduction component in its entirety at or after forwarding of the interrupting first audio message is completed.

21. The device of claim 17, wherein the second audio message is started to be received prior to starting to receive the first audio message, the forwarding of the first audio message to the audio reproduction component interrupting a prior forwarding of the second audio message to the audio reproduction component, the processor further configured to:

re-forward only a portion of the second audio message that was not yet forwarded to the audio reproduction component after the forwarding of the interrupting first audio message is completed.