SCALABLE VIDEO BROADCASTING APPARATUS AND METHOD OVER MULTIBAND SATELLITE CHANNEL

• US 20110235701A1
• Filed: 09/04/2008
• Published: 09/29/2011
• Est. Priority Date: 12/18/2007
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Ryu, Joongyu, Kim, Seungchul, Choi, Euna, Chang, Dae-Ig, Shin, Min-Su
• Application Number:
  US12/809,451
• Publication Number:
  US 20110235701A1
• Time in Patent Office: Days
• US Class Current: 375/240.02
• CPC Class Codes: H04H 20/51 specially adapted for satellite broadcast systems
• CPC Class Codes: H04N 21/234327 by decomposing into layers, e.g. base layer and one or more enhancement layers
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/4381 Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/6143 involving transmission via a satellite
• CPC Class Codes: H04N 21/6193 involving transmission via a satellite arrangements for data linking, networking or transporting, or for controlling an end to end session in a satellite broadcast system H04B7/18526
• CPC Class Codes: H04N 21/631 Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols
• CPC Class Codes: H04N 21/64792 Controlling the complexity of the content stream, e.g. by dropping packets intermediate media network packet handling H04L65/765; proxy provisioning conversion or adaptation for reducing the amount or size of exchanged application data H04L67/5651; negotiation of resources in wireless networks H04W28/16
• CPC Class Codes: H04N 7/20 Adaptations for transmission via a GHz frequency band, e.g. via satellite

Abstract

Provided is an apparatus and method for transmitting/receiving multiband broadcasting using scalable video coding, which can solve a limitation of a transmission band in a multichannel satellite broadcasting service and increase availability of a satellite broadcasting service by scalably encoding video data and transmitting the data using a different transmission band for each layer. The apparatus for transmitting multiband broadcasting using scalable video coding includes: a scalable video encoder for scalably encoding video data to generate a scalable video stream having multiple layers; a multiplexer for multiplexing the scalable video elementary stream having multiple layers, a compressed audio elementary stream, and program specification information to generate a transport stream (TS); and a multiband transmitter for separating packets of the TS into multiple TSs according to pre-given priority information and transmitting the packet streams using a different transmission band.

Claims

1. An apparatus for transmitting multiband broadcasting based on scalable video coding, the apparatus comprising:

a scalable video encoder for scalably encoding video data to generate a scalable video stream having multiple layers;

a multiplexer for multiplexing the scalable video stream having multiple layers, a compressed audio elementary stream, and program specification information to generate a transport stream (TS); and

a multiband transmitter for separating the TS into multiple TS according to a given priority information and transmitting the packet stream using a different transmission band.

2. The apparatus of claim 1, wherein the scalable video encoder generates a base layer video stream and an enhancement layer video stream according to spatial scalable video coding (SVC).

3. The apparatus of claim 2, wherein the multiband transmitter comprises:

a scalable separator for classifying a packet corresponding to the program specification information and the base-layer video stream as a first layer packet stream and classifying a packet corresponding to the enhancement layer video stream as a second layer packet stream;

a first band transmitter for transmitting the first layer packet stream using a first band; and

a second band transmitter for transmitting the second layer packet stream using a second band.

4. The apparatus of claim 3, wherein the scalable separator performs packet classification by using program identification (PID) information allocated to each TS packet.

5. The apparatus of claim 3, wherein the first band and the second band are a Ku band and a Ka band in multiband satellite broadcasting, respectively.

6. The apparatus of claim 3, wherein the first band transmitter and the second band transmitter use different transmission schemes.

7. An apparatus for receiving multiband broadcasting service using scalable video coding, the apparatus comprising:

a multiband receiver for restoring packet streams from broadcasting signals transmitted through different frequency bands and combining the restored packet streams to restore a single transport stream (TS);

a demultiplexer for splitting the restored single TS into scalable video streams having multiple layers and program specification information; and

a video decoder for decoding the scalable video streams having multiple layers.

8. The apparatus of claim 7, wherein the multiband receiver comprises:

a first band receiver for receiving and demodulating a first band broadcasting signal to restore a first layer packet stream including a base layer video stream and program specification information;

a second band receiver for receiving and demodulating a second band broadcasting signal to restore a second layer packet stream including an enhancement layer video stream; and

a scalable combiner combining the first layer packet stream and the second layer packet stream based on time information of a packet header to generate the TS.

9. The apparatus of claim 8, wherein the demultiplexer splits the TS into the base layer video stream, the program specification information, and the enhancement layer video stream.

10. The apparatus of claim 9, wherein the demultiplexer examines the enhancement layer video stream for a packet error, and discards a packet from which an error is detected.

11. The apparatus of claim 8, wherein the first band broadcasting signal and the second band broadcasting signal are satellite broadcasting signals received in a Ku band and a Ka band in multiband satellite broadcasting, respectively.

12. A method of transmitting multiband satellite broadcasting based on scalable video coding, the method comprising:

scalably encoding video data to generate scalable video stream having multiple layers;

multiplexing the generated scalable video elementary stream having multiple layers, compressed audio elementary stream, and program specification information to generate a transport stream (TS); and

separating the TS into multiple TSs according to pre-given priority information and transmitting the packets using a different transmission band for each layer.

13. The method of claim 12, wherein said encoding of the video data comprises generating a base layer video stream and an enhancement layer video stream according to spatial scalable video coding (SVC).

14. The method of claim 13, wherein said transmitting of the packets comprises:

classifying a packet corresponding to the program specification information and the base layer video stream as a first layer packet stream and transmitting the first layer packet stream using a first band; and

classifying a packet corresponding to the enhancement layer video stream as a second layer packet stream and transmitting the second layer packet stream using a second band.

15. The method of claim 14, wherein the first band and the second band are a Ku band and a Ka band in multiband satellite broadcasting, respectively.

16. The method of claim 14, wherein the first layer packet stream and the second layer packet stream are transmitted by different transmission schemes.