Continuous media stream control

• US 6,097,380 A
• Filed: 06/24/1996
• Issued: 08/01/2000
• Est. Priority Date: 06/24/1996
• Status: Expired due to Term

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Crites, Brian D., Praitis, Edward J.
• Primary Examiner(s): Nguyen, Phu K.
• Assistant Examiner(s): Vo, Cliff N.
• Application Number:
  US08/669,983
• Time in Patent Office: 1,499 Days
• Field of Search: 345/302, 345/326, 345/333, 345/334, 345/335
• US Class Current: 715/246
• CPC Class Codes: G06F 9/465 Distributed object oriented systems remote method invocation [RMI] G06F9/548

Abstract

A network system includes one or more network servers and a plurality of available media streams. The media streams are formatted differently. Some are file-based streams, supplied by the network servers. Others are supplied by local tuners from digital and/or analog signal broadcasts. A network client executes an application program that is to control rendering of the media streams. Each media stream is represented by a programming object. Each programming object has identical interface functions that can be invoked by the application program to control playback of the different media streams even though such media streams are of different media types.

Claims

1. In a computer system that includes a plurality of media sources of different types, a method comprising the following steps:

creating programming objects representing the respective media sources, the programming objects having common object interfaces regardless of the types of media sources represented by the respective programming objects;

invoking the interfaces of the programming objects to control media rendering from the media sources represented by the programming objects.

2. A method as recited in claim 1, wherein the common object interfaces include:

a play interface for starting and pausing rendering of media streams from the media sources;

a volume control interface for setting volume levels of media streams from the media sources.

3. A method as recited in claim 1, wherein the common object interfaces include:

a play control interface for starting and pausing rendering of media streams from the media sources;

a volume control interface for setting volume levels of media streams from the media sources;

a video control interface for setting position and size parameters of video media streams from the media sources.

4. A method as recited in claim 1, wherein the step of creating a programming object comprises:

creating a media-specific programming object representing a specific media source;

invoking a general-media object creation function with reference to the media-specific programming object, the general-media object creation function creating a general-media programming object representing the specific media source regardless of the type of the media source, the general-media programming object having the common object interfaces.

5. A method as recited in claim 1, wherein the step of creating programming objects comprises:

creating programming objects representing digital data streams;

creating programming objects representing analog broadcasts;

the programming objects having common object interfaces regardless of whether they represent digital data streams or analog broadcasts.

6. In a computer network having a plurality of media streams available from one or more network servers, a method of playing the media streams at a network client, the method comprising:

receiving a source designation from one of the network servers, the source designation specifying a media stream;

creating a programming object representing the media source based on the source designation, the programming object having common interfaces regardless of the type of media stream represented by the programming object.

7. A method as recited in claim 6, wherein the programming object comprises:

a play interface for starting and pausing rendering of media streams from the network servers;

a volume control interface for setting volume levels of media streams being rendered from the network servers.

8. A method as recited in claim 6, wherein the programming object comprises:

a play interface for starting and pausing rendering of media streams from the network servers and for starting and pausing rendering of media streams from analog sources;

a volume control interface for setting volume levels of media streams from the network servers and for setting volume levels from analog sources.

9. A method as recited in claim 6, wherein the programming object comprises:

a play interface for starting and pausing rendering of media streams from the network servers and for starting and pausing rendering of media streams from analog sources;

a volume control interface for setting volume levels of media streams from the network servers and for setting volume levels from analog sources;

a video control interface for setting position and size parameters of video media streams from the network servers and for setting position and size parameters of video media streams from analog sources.

10. A method as recited in claim 6, wherein the step of creating a programming object comprises:

creating a first media-specific programming object representing a digital media source;

creating a second media-specific programming object representing an analog media source;

invoking a general-media object creation function with reference to the first media-specific programming object, the general-media object creation function creating a first general-media programming object representing the digital media source and having the common object interfaces;

invoking the general-media object creation function with reference to the second media-specific programming object, the general-media object creation function creating a second general-media programming object representing the analog media source and having the common object interfaces.

11. In a computer system, a method comprising the following steps:

obtaining source designations for a plurality of media sources of different types;

passing each source designation to the same object creation function;

the object creation function creating programming objects representing the respective media sources based on the source designations, the programming objects having common interfaces regardless of the types of media sources represented by the respective programming objects;

invoking the interfaces of the programming objects to control media rendering from the media sources represented by the programming objects.

12. A method as recited in claim 11, wherein a source designation indicates a server ID and a filename.

13. A method as recited in claim 11, wherein a source designation indicates a channel number.

14. A method as recited in claim 11, wherein a source designation indicates a frequency.

15. A method as recited in claim 11, wherein source designations are references to object interfaces, the object interfaces having one or more functions that identify the media sources.

16. A method as recited in claim 11, wherein the common interfaces include:

a play interface for starting and pausing rendering of media streams;

a volume control interface for setting volume levels of media streams;

a video control interface for setting position and size parameters of video media streams.

17. A method as recited in claim 11, wherein the common interfaces include:

a play interface for starting and pausing rendering of media streams from the network servers and for starting and pausing rendering of media streams from analog sources;

a volume control interface for setting volume levels of media streams from the network servers and for setting volume levels from analog sources;

a video control interface for setting position and size parameters of video media streams from the network servers and for setting position and size parameters of video media streams from analog sources.

18. A method as recited in claim 11, wherein the object creation function creates programming objects representing both analog and digital media sources, said programming objects having common object interfaces regardless of whether they represent analog or digital media sources.

19. A computer system comprising:

programming objects representing respective media streams;

the programming objects having common interface functions that are callable to control playback of different media streams even though such media streams are of different media types.

20. A computer system as recited in claim 19, further comprising a local analog tuner that is one of the media sources.

21. A computer system as recited in claim 19, further comprising a remote network server that is one of the media sources.

22. A computer system as recited in claim 19, further comprising the plurality of media sources, the plurality of media sources including a remote network server and a local analog tuner.

23. A computer system as recited in claim 19, the common interface functions including:

a play interface for starting and pausing rendering of the media streams;

a volume control interface for setting volume levels of the media streams.

24. A computer system as recited in claim 19, the common interface functions including:

a play interface for starting and pausing rendering of the media streams;

a volume control interface for setting volume levels of the media streams;

a video control interface for setting position and size parameters of the media streams.

25. A network system comprising:

one or more network servers;

a plurality of media streams available from the one or more network servers, the media streams being of different media types;

a network client;

an application program executing at the network client;

programming objects representing the respective media streams, the programming objects having common interface functions that are invoked by the application program to control playback of different media streams even though such media streams are of different media types.

26. A network system as recited in claim 25, the common interface functions including:

a play interface for starting and pausing rendering of the media streams;

a volume control interface for setting volume levels of the media streams.

27. A network system as recited in claim 25, the common interface functions including:

a play interface for starting and pausing rendering of the media streams;

a volume control interface for setting volume levels of the media streams;

a video control interface for setting position and size parameters of the media streams.

28. A network system as recited in claim 25, further comprising a local analog tuner, wherein the common interface functions can be invoked by the application program to control playback of the local analog tuner.

29. A network system as recited in claim 28, the common interface functions including:

a play interface for starting and pausing rendering of the media streams and of the local analog tuner;

a volume control interface for setting volume levels of the media streams and of the local analog tuner.

30. A network system as recited in claim 28, the common interface functions including:

a play interface for starting and pausing rendering of the media streams and of the local analog tuner;

a volume control interface for setting volume levels of the media streams and of the local analog tuner;

a video control interface for setting position and size parameters of the media streams and of the local analog tuner.

31. A computer-readable storage medium containing instructions for creating programming objects representing media sources of different types, the programming objects having common object interfaces regardless of the types of media sources represented by the respective programming objects, said object interfaces being callable to control rendering of media streams supplied by the media sources.

32. A computer-readable storage medium as recited in claim 31, wherein the instructions contained on the computer-readable storage medium are further for creating programming objects representing digital data streams and for creating programming objects representing analog broadcasts.