Hybrid method for delivering streaming media within the home

• US 8,499,090 B2
• Filed: 12/30/2008
• Issued: 07/30/2013
• Est. Priority Date: 12/30/2008
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Knowlson, Kenneth L., Cain, Gamil A., Joshi, Ajit P., Wang, Jason Hongfeng
• Primary Examiner(s): Whipple, Brian P
• Assistant Examiner(s): Emdadi, Keyvan
• Application Number:
  US12/317,840
• Publication Number:
  US 20100169502A1
• Time in Patent Office: 1,673 Days
• Field of Search: 709/231
• US Class Current: 709/231
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 67/5681 Pre-fetching or pre-delivering data based on network characteristics

Abstract

A hybrid system and method for delivering “streaming” media within the home. According to the method, small portions of media items from a controlling device are received at a rendering device for pre-caching into a cache. Upon a user selecting a media item for playback, play of the media item is immediately started from the cache in real-time while the remaining portions of the selected media item are downloaded from the controlling device and appended to cache at a rate faster than real-time.

Claims

1. A home network system comprising:

a controlling device having storage to store a plurality of multimedia items;

a plurality of rendering devices coupled to the controlling device, each of the plurality of rendering devices are connected to a monitor and comprising storage, the storage of at least one of the rendering devices comprising a partitioned cache of a pre-determined length to (i) enable a portion of a protected multimedia item received from the controlling device using content protection technology to be pre-cached in a protected manner on the at least one rendering device prior to selection by a user for viewing, and (ii) pre-cache a first key obtained via a first key exchange in response to the portion of the protected multimedia item being pre-cached into the partitioned cache prior to selection by the user for viewing, the first key to decrypt the portion of the protected multimedia item pre-cached in the partitioned cache;

wherein in response to the user selection of the protected multimedia item for viewing, the partitioned cache to expand and a remaining portion of the protected multimedia item to be progressively streamed from the controlling device to the cache at a rate faster than real-time while the monitor simultaneously displays the multimedia item from the cache; and

wherein the partitioned cache further to store and protect a second key, the second key to decrypt the remaining portion of the protected multimedia item being progressively streamed from the controlling device.

2. The system of claim 1, wherein upon selection of the protected multimedia item by the user for viewing, the selected protected multimedia item to begin play of the pre-cached portion in real-time while the remaining portion of the selected protected multimedia item to be appended to the pre-cached portion of the selected protected multimedia item in the cache at the faster than real-time rate.

3. The system of claim 1, wherein intelligent prediction based on past usage and recently acquired media is used to determine multimedia items to be pre-cached on the rendering devices.

4. The system of claim 1, further comprising an interface at the rendering devices to enable users of the rendering devices to select and rate multimedia items stored on the controlling device, and based on the ratings, to enable multimedia items to be pre-cached on the rendering devices.

5. The system of claim 1, wherein a second secure key exchange to occur to obtain the second key in response to the remaining portion of the protected multimedia item being progressively streamed from the controlling device.

6. A hybrid streaming method comprising:

receiving portions of protected media items from a controlling device for pre-caching into a cache of a rendering device, wherein the cache is a pre-determined length and the portions of the protected media items being received from the controlling device using content protection technology;

obtaining, prior to a user selecting a protected media item for playback, a first encryption key via a first secure key exchange, the first encryption key for decrypting the pre-cached portion of the protected media item;

pre-caching the first encryption key for decrypting the portion of the protected media item into the cache of the rendering device;

upon the user selecting the protected media item for playback;

(i) expanding the cache, (ii) immediately decrypting, using the first encryption key, the pre-cached portion of the protected media item selected by the user, (iii) playing the decrypted portion of the selected protected media item from the cache in real-time for the user, (iv) simultaneously downloading remaining portions of the selected protected media item into the cache at a rate faster than real-time while the selected protected media item from the cache is playing, and (v) decrypting, using a second encryption key, the remaining portions of the selected protected media item; and

upon the user requesting usage of a trick mode, performing one of;

(i) allowing usage of the trick mode until a pre-determined amount of time before an end of the selected protected media item in the cache and (ii) allowing trick mode usage past the end of the selected protected media item in the cache and streaming the remaining portions of the selected protected media item from the controlling device in real-time.

7. The method of claim 6, wherein the controlling device connects to the rendering device to pre-cache the portions of the protected media items.

8. The method of claim 6, wherein the rendering device enables the user to browse media items on the controlling device prior to selecting the protected media item for playback.

9. The method of claim 6, wherein the download of the remaining portions of the selected protected media item begins as an offset that corresponds to an end location of the portions of the selected protected media item that were pre-cached.

10. The method of claim 6, further comprising receiving the remaining portions of the selected protected media item and appending the remaining portions of the selected protected media item to a corresponding file in the cache until the cache is full.

11. The method of claim 10, wherein the cache acts as a moving buffer, playing the selected protected media item from the cache in real-time while continuously filling the cache with the remaining portions of the selected protected media item faster than real-time.

12. The method of claim 11, wherein if an event occurs at the controlling device to slow or halt the download of the remaining portions of the selected protected media item resulting in a reduced cache, filling the cache at a faster speed when the event stops.

13. The method of claim 10, wherein the cache acts as a moving buffer, playing the remaining portions of the selected protected media item from the cache in real-time while continuously filling the cache with other remaining portions of the selected protected media item faster than real-time.

22. The method of claim 6, further comprising:

obtaining, through a second secure key exchange, the second encryption key for decrypting the remaining portions of the selected protected media item; and

caching and protecting the second encryption key for decrypting the remaining portions of the selected protected media item.

14. An article comprising:

a non-transitory a storage medium having a plurality of machine accessible instructions, wherein when the instructions are executed by a processor, the instructions provide for;

receiving portions of protected media items from a controlling device for pre-caching into a cache of a rendering device, wherein the cache is a pre-determined length and the portions of the protected media items being received from the controlling device using content protection technology;

obtaining, prior to a user selecting a protected media item for playback, a first encryption key via a first secure key exchange, the first encryption key for decrypting the pre-cached portion of the protected media item;

pre-caching the first encryption key for decrypting the portion of the protected media item into the cache of the rendering device;

upon the user selecting the protected media item for playback;

(i) expanding the cache, (ii) immediately decrypting, using the first encryption key, the pre-cached portion of the protected media item selected by the user, (iii) playing the decrypted portion of the selected protected media item from the cache in real-time for the user, (iv) simultaneously downloading remaining portions of the selected protected media item into the cache at a rate faster than real-time while the selected protected media item is playing, and (v) decrypting, using a second encryption key, the remaining portions of the selected protected media item; and

upon the user requesting usage of a trick mode, performing one of;

(i) allowing usage of the trick mode until a pre-determined amount of time before an end of the selected protected media item in the cache and (ii) allowing trick mode usage past the end of the selected protected media item in the cache and streaming the remaining portions of the selected protected media item from the controlling device in real-time.

15. The article of claim 14, wherein the controlling device connects to the rendering device to pre-cache the portions of the protected media items.

16. The article of claim 14, wherein the rendering device enables the user to browse media items on the controlling device prior to selecting the protected media item for playback.

17. The article of claim 14, wherein the download of the remaining portions of the selected protected media item begins at an offset that corresponds to an end location of the portions of the selected protected media item that were pre-cached.

18. The article of claim 14, further comprising instructions for receiving the remaining portions of the selected protected media item and appending the remaining portions of the selected protected media item to a corresponding file in the cache until the cache is full.

19. The article of claim 18, wherein the cache acts as a moving buffer, playing the selected protected media item from the cache in real-time while continuously filling the cache with the remaining portions of the selected protected media item faster than real-time.

20. The article of claim 19, wherein if an event occurs at the controlling device to slow or halt the download of the remaining portions of the selected protected media item resulting in a reduced cache, further comprising instructions for filling the cache at a faster speed when the event stops.

21. The article of claim 18, wherein the cache acts as a moving buffer, playing the remaining portions of the selected protected media item from the cache in real-time while continuously filling the cache with other remaining portions of the selected protected media item faster than real-time.

23. The article of claim 14, further comprising instructions for:

obtaining, through a second secure key exchange, the second encryption key for decrypting the remaining portions of the selected protected media item; and

caching and protecting the second encryption key for decrypting the remaining portions of the selected protected media item.