Media Processing Devices With Joint Encryption-Compression, Joint Decryption-Decompression, And Methods Thereof

• US 20110191587A1
• Filed: 01/27/2011
• Published: 08/04/2011
• Est. Priority Date: 02/02/2010
• Status: Abandoned Application

• Current Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Inventors: Tian, Jun, Yu, Hong Heather
• Application Number:
  US13/015,308
• Publication Number:
  US 20110191587A1
• Time in Patent Office: Days
• US Class Current: 713/168
• CPC Class Codes: H04L 9/32 including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
• CPC Class Codes: H04N 21/2347 involving video stream encryption

Abstract

In one embodiment, a method of adaptive media streaming includes receiving a cipher media stream at a media device. The cipher media stream is compliant with a media compression standard. The cipher media stream is decrypted and decoded using an inverse stream cipher algorithm and a compressed media stream is generated by combining the cipher media stream with a keystream.

Claims

1. A method of streaming media from a network component, the method comprising:

generating a decorrelated media stream by applying a decorrelation transform to media content to be streamed;

quantizing the decorrelated media stream; and

encoding the quantized decorrelated media stream, wherein the encoding comprises;

generating an encoded media stream by applying entropy encoding on the quantized decorrelated media stream, and generating a cipher media stream comprising the media content by combining the encoded media stream with a keystream, the cipher media stream being generated using a stream cipher algorithm, wherein at least one of the generating a decorrelated media stream, the quantizing the decorrelated media stream, and the encoding the quantized decorrelated media stream is performed using a processor.

2. The method of claim 1, further comprising transmitting the cipher media stream.

3. The method of claim 1, further comprising:

receiving a media processing request from a media device; and

performing media operations on the cipher media stream based on the media processing request without decrypting the cipher media stream.

4. The method of claim 1, wherein the encoded media stream is combined with the keystream using a logical operator.

5. The method of claim 4, wherein the logical operator is an exclusive or (XOR) operator.

6. The method of claim 1, further comprising transmitting a key for generating the keystream through a secure transmission.

7. The method of claim 6, further comprising:

receiving the key at a media device;

receiving the cipher media stream at the media device, wherein the cipher media stream is compliant with media compression standards;

decrypting and decoding the cipher media stream, wherein the decoding comprises;

using an inverse stream cipher algorithm, generating a compressed media stream by combining the cipher media stream with a keystream generated using the key;

generating a decoded media stream by applying entropy decoding on the compressed media stream;

dequantizing the decoded media stream; and

generating an uncompressed media stream by applying an inverse decorrelation transform to the dequantized media stream.

8. The method of claim 1, wherein the cipher media stream is compliant with media compression standards.

9. A method of adaptive media streaming, the method comprising:

receiving a cipher media stream at a media device, wherein the cipher media stream is compliant with a media compression standard; and

decrypting and decoding the cipher media stream, wherein the decoding comprises;

using an inverse stream cipher algorithm to generate a compressed media stream by combining the cipher media stream with a keystream.

10. The method of claim 9, further comprising:

generating a decoded media stream by applying entropy decoding on the compressed media stream;

dequantizing the decoded media stream; and

generating an uncompressed media stream by applying an inverse decorrelation transform to the dequantized media stream.

11. The method of claim 10, further comprising displaying the uncompressed media stream.

12. The method of claim 9, further comprising:

performing media operations on the cipher media stream without decrypting the cipher media stream.

13. The method of claim 9, wherein the cipher media stream is combined with the keystream using a logical operator.

14. The method of claim 13, wherein the logical operator is an exclusive or (XOR) operator.

15. The method of claim 9, further comprising receiving a key for generating the keystream through a secure transmission.

16. A media server comprising:

a decorrelator configured to generate a decorrelated media stream by applying a decorrelation transform to media content to be streamed;

a quantizer configured to quantize the decorrelated media stream; and

an encoder comprising a entropy encoder, a stream cipher generator, and a keystream generator, wherein the entropy encoder is adapted to generate an encoded media stream by applying entropy encoding on the quantized decorrelated media stream, and wherein the stream cipher generator is adapted to use a stream cipher algorithm to generate a cipher media stream by combining the encoded media stream with a keystream from the keystream generator.

17. The media server of claim 16, further comprising a transmitter adapted to:

transmit the cipher media stream, and

transmit a key for generating the keystream through a secure transmission.

18. The media server of claim 16, further comprising:

a receiver adapted to receive a media processing request from a media device; and

a media processor to perform media operations on the cipher media stream based on the media processing request without decrypting the cipher media stream.

19. The media server of claim 16, wherein the stream cipher generator combines the encoded media stream with the keystream using a logical operator, wherein the logical operator is an exclusive or (XOR) operator.

20. The media server of claim 16, wherein the cipher media stream is compliant with media compression standards.

21. A media device comprising:

a receiver configured to receive a cipher media stream, wherein the cipher media stream is compliant with media compression standards; and

a decoder configured to decrypt and decode the cipher media stream, the decoder comprising a stream cipher generator and a keystream generator, wherein the stream cipher generator is configured to generate a compressed media stream by combining the cipher media stream with a keystream from the keystream generator using an inverse stream cipher algorithm.

22. The media device of claim 21, wherein the decoder further comprises a entropy decoder configured to generate a decoded media stream by applying entropy decoding on the compressed media stream, wherein the media device further comprises:

a dequantizer configured to dequantize the decoded media stream; and

an inverse decorrelator configured to generate an uncompressed media stream by applying an inverse decorrelation transform to the dequantized media stream.

23. The media device of claim 22, further comprising:

a receiver configured to receive a key for generating the keystream through a secure transmission; and

a display configured to display the uncompressed media stream.

24. The media device of claim 21, further comprising:

a media processor configured to perform media operations on the cipher media stream without decrypting the cipher media stream.

25. The media device of claim 21, wherein the stream cipher generator combines cipher media stream with the keystream using a logical operator, wherein the logical operator is an exclusive or (XOR) operator.