MULTIMEDIA STREAM RECORDING METHOD AND PROGRAM PRODUCT AND DEVICE FOR IMPLEMENTING THE SAME

• US 20110161515A1
• Filed: 03/11/2010
• Published: 06/30/2011
• Est. Priority Date: 12/31/2009
• Status: Abandoned Application

• Current Assignee: Vivotek, Inc.
• Original Assignee: Vivotek, Inc.
• Inventors: LIU, Shu Fen, CHANG, Yung Shen, CHEN, Sheng Yuan
• Application Number:
  US12/722,105
• Publication Number:
  US 20110161515A1
• Time in Patent Office: Days
• US Class Current: 709/231
• CPC Class Codes: G08B 13/19669 Event triggers storage or change of storage policy
• CPC Class Codes: H04N 7/188 Capturing isolated or intermittent images triggered by the occurrence of a predetermined event, e.g. an object reaching a predetermined position signal generation from motion picture films H04N5/253
• CPC Class Codes: H04N 9/7921 for more than one processing mode

Abstract

A multimedia stream recording method, and a program product and a device for implementing the same are presented. The method includes encoding multimedia data into multimedia streams and storing the multimedia streams in a queue; detecting an event; recording the multimedia streams in a storage device at a low frame rate in a normal recording mode; when the event occurs, converting the multimedia streams stored in the queue before a time point when the event occurs into the specific file format and storing the multimedia streams in the storage device according to a preset condition; and converting the multimedia streams in a preset time range after the time point when the event occurs into the specific file format and then storing the multimedia streams in the storage device, and subsequently recovering a normal storage mode.

Claims

1. A multimedia stream recording method, comprising:

encoding multimedia data into multimedia streams and storing the multimedia streams in a queue;

detecting an event and generating a trigger signal to change a recording mode when the event occurs;

in a normal state, converting the multimedia streams in the queue into a specific file format and recording the multimedia streams in a storage device at a low frame rate in a normal recording mode;

when the event occurs, converting the multimedia streams stored in the queue before a time point when the event occurs into the specific file format and then storing the multimedia streams in the storage device according to a preset condition; and

converting the multimedia streams in a preset time range after the time point when the event occurs into the specific file format and then storing the multimedia streams in the storage device, and subsequently recovering a normal storage mode.

2. The multimedia stream recording method according to claim 1, wherein the multimedia data comprises video and/or audio.

3. The multimedia stream recording method according to claim 1, wherein the event occurring outside is detected and the trigger signal is generated by any one of a motion detector, a reed switch for door and window against theft, and a face detection module.

4. The multimedia stream recording method according to claim 1, wherein the specific file format is any one of *.avi, *.mp4, *.wmv, *.mpg, MPEG-4, and Third Generation Partnership Project (3gpp).

5. The multimedia stream recording method according to claim 1, further comprising:

encoding the multimedia data into the low-quality multimedia streams with a low encoding quality in the normal state.

6. The multimedia stream recording method according to claim 1, further comprising:

directly converting the encoded multimedia streams into the specific file format and storing the multimedia streams in the storage device.

7. The multimedia stream recording method according to claim 1, wherein the preset condition is the multimedia streams within a certain time length.

8. The multimedia stream recording method according to claim 1, wherein the preset condition is all the multimedia streams currently still existing in the queue.

9. A computer program product, for storing therein a program for recording multimedia streams, capable of accomplishing a method according to claim 1 after a computer loads and runs the computer program.

10. A device for implementing a method according to claim 1, comprising:

an encoder, for encoding multimedia data into multimedia streams according to an encoding profile;

a buffer, being a first-in, first-out (FIFO) buffer and functioning as a queue in the method for storing the multimedia streams;

a recorder, for converting the multimedia streams in the buffer into a specific file format and storing the multimedia streams in a storage device;

an event detector, for detecting an event and generating a corresponding trigger signal to change a recording mode when the event occurs; and

an event manager, for controlling the recorder to run a normal storage mode in a normal state so as to convert the multimedia streams in the buffer into the specific file format and store the multimedia streams in the storage device at a low frame rate, controlling the recorder to convert the multimedia streams stored in the buffer before a time point when the event occurs into the specific file format and then store the multimedia streams in the storage device according to a preset condition when the event occurs, and controlling the recorder to convert the multimedia streams in a preset time range after the time point when the event occurs into the specific file format and then store the multimedia streams in the storage device, and subsequently recover the normal storage mode.

11. The device according to claim 10, wherein the multimedia data comprises video and/or audio.

12. The device according to claim 10, wherein the event detector is any one of a motion detector, a reed switch for door and window against theft, and a face detection module.

13. The device according to claim 10, wherein the specific file format is any one of *.avi, *.mp4, *.wmv, *.mpg, MPEG-4, and Third Generation Partnership Project (3gpp).

14. The device according to claim 10, wherein the encoder encodes the multimedia data into the low-quality multimedia streams with a low encoding quality in the normal state.

15. The device according to claim 10, further comprising:

an input/output (I/O) interface, wherein the event manager is controlled through the I/O interface to collect or manage the event and change a frame-rate setting in the normal recording mode and an encoding quality of the encoder.

16. The device according to claim 10, wherein the preset condition is the multimedia streams within a certain time length.

17. The device according to claim 10, wherein the preset condition is all the multimedia streams currently still existing in the queue.