Encoder and decoder to encode signal into a scable codec and to decode scalable codec, and encoding and decoding methods of encoding signal into scable codec and decoding the scalable codec

• US 20070291835A1
• Filed: 02/22/2007
• Published: 12/20/2007
• Est. Priority Date: 06/16/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Sung, Hosang, Oh, Eunmi, Kim, Junghoe, Lee, Kangeun
• Granted Patent: US 9,094,662 B2
• Time in Patent Office: Days
• US Class Current: 375/240
• CPC Class Codes: G10L 19/12 the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
• CPC Class Codes: G10L 19/24 Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
• CPC Class Codes: H04N 19/115 Selection of the code volume for a coding unit prior to coding
• CPC Class Codes: H04N 19/164 Feedback from the receiver or from the transmission channel
• CPC Class Codes: H04N 19/187 the unit being a scalable video layer
• CPC Class Codes: H04N 19/30 using hierarchical techniques, e.g. scalability H04N19/63 takes precedence
• CPC Class Codes: H04N 21/234327 by decomposing into layers, e.g. base layer and one or more enhancement layers
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/6437 Real-time Transport Protocol [RTP]

Abstract

An encoder and decoder to encode one or more input signals into a scalable codec and to decode the scalable codec, and encoding and decoding methods using a bitstream with a layered structure in the scalable codec change a top coding bit rate to encode the input signals according to a network status, and the bitstream is decoded by analyzing the top coding bit rate included in the bitstream.

Claims

1. A method of encoding input signals, the method comprising:

determining a top coding bit rate to encode one or more input signals; and

encoding the input signals into a layered structure according to the determined top coding bit rate as a scalable codec.

2. The method according to claim 1, wherein the encoding of the input signals comprises:

generating information representing the determined top coding bit rate; and

encoding the input signals into the layered structure according to the determined top coding bit rate to generate a bitstream including the information.

3. The method according to claim 2, wherein the encoding of the input signals comprises truncating one or more layers of the bitstream in a network.

4. The method according to claim 1, further comprising:

estimating a status of a network,

wherein the determining of the top coding bit rate comprises determining the top coding bit rate according to the estimated network status.

5. The method according to claim 1, wherein the determining of the top coding bit rate is performed in a network or a terminal.

6. A method of encoding input signals, the method comprising:

estimating a status of a network;

determining a top coding bit rate to encode one or more input signals using the estimated network status; and

encoding the input signals into a layered structure according to the determined top coding bit rate to generate a bitstream including a syntax representing the top coding bit rate as a scalable codec.

7. The method according to claim 6, wherein the determining of the top coding bit rate comprises determining the top coding bit rate in the network or a terminal.

8. The method according to claim 6, wherein the encoding of the input signals comprises truncating one or more layers of the bitstream in the network.

9. A method of decoding a scalable codec of a bitstream encoded into a layered structure, the method comprising:

analyzing a top coding bit rate included in a bitstream of a scalable codec; and

decoding the bitstream encoded into the layered structure according to the analyzed top coding bit rate.

10. The method according to claim 9, wherein the top coding bit rate is determined according to a network status.

11. The method according to claim 9, wherein the top coding bit rate is determined in a network or a terminal.

12. The method according to claim 9, wherein the bitstream comprises one or more layers truncated in a network.

13. A computer readable recording medium having recorded thereon a program for executing a method of encoding input signals to a scalable codec into a layered structure, the method comprising:

determining a top coding bit rate to encode one or more input signals; and

encoding the input signals into a layered structure according to the determined top coding bit rate as a scalable codec.

14. A computer readable recording medium having recorded thereon a program for executing a method of encoding input signals to a scalable codec into a layered structure, the method comprising:

estimating a status of a network;

determining a top coding bit rate to encode one or more input signals using the estimated network status; and

encoding the input signals into a layered structure according to the determined top coding bit rate and generating a bitstream including a syntax representing the top coding bit rate as a scalable codec.

15. A computer readable recording medium having recorded thereon a program for executing a method of decoding in a scalable codec a bitstream encoded into a layered structure, the method comprising:

analyzing a top coding bit rate included in a bitstream of a scalable codec; and

decoding the bitstream encoded into a layered structure according to the analyzed top coding bit rate.

16. An encoder to encode input signals into a layered structure, the encoder comprising:

a transfer rate determining unit to determined a top coding bit rate to encode one or more input signals; and

an encoding unit to encode the input signals into a layered structure according to the determined top coding bit rate as a scalable codec.

17. The encoder according to claim 16, wherein the encoding unit comprises:

a generating unit to generate information representing the determined top coding bit rate; and

a bitstream generating unit to encode the input signals into the layered structure according to the determined top coding bit rate to generate a bitstream including the information as the scalable codec.

18. The encoder according to claim 16, further comprising:

an estimating unit to estimate a status of a network,

wherein the determining unit determines the top coding bit rate using the estimated network status.

19. The encoder according to claim 16, wherein the determining unit determines the top coding bit rate in a network or a terminal.

20. The encoder according to claim 17, wherein the bitstream comprises one or more layers truncated in the network.

21. An encoder to encode one or more input signals, the encoder comprising:

a status estimating unit to estimate a status of a network;

a determining unit to determine a top coding bit rate to encode one or more input signals using the estimated network status; and

a bitstream generating unit to encode the input signals into a layered structure according to the determined top coding bit rate to generate a bitstream including a syntax representing the top coding bit rate, as a scalable codec.

22. The encoder according to claim 21, wherein the determining unit determines the top coding bit rate in the network or a terminal.

23. The encoder according to claim 21, wherein the bitstream comprises one or more layers truncated in the network.

24. A decoder to decode a bitstream encoded into a layered structure, the decoder comprising:

an analyzing unit to analyze a top coding bit rate included in a bitstream encoded in a layered structure; and

a decoding unit to decode the bitstream encoded into the layered structure according to the analyzed top coding bit rate.

25. The decoder according to claim 24, wherein the top coding bit rate is determined according to a network status.

26. The decoder according to claim 24, wherein the top coding bit rate is determined in a network or a terminal.

27. The decoder according to claim 24, wherein the bitstream comprises one or more layers truncated in a network.

28. A scalable codec system comprising:

an encoder to determine a top coding bit rate to encode one or more input signals, and to encode the input signals into a layered structure according to the determined top coding bit rate to generate a bitstream including a syntax representing the top coding bit rate, as a scalable codec; and

a decoder to analyze the top coding bit rate included in the bitstream of the scalable codec, and to decode the bitstream according to the analyzed top coding bit rate.