SCALABLE TRANSMITTING/RECEIVING APPARATUS AND METHOD FOR IMPROVING AVAILABILITY OF BROADCASTING SERVICE

• US 20100272190A1
• Filed: 09/04/2008
• Published: 10/28/2010
• Est. Priority Date: 12/19/2007
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Kim, Pansoo, Chang, Dae-Ig, Kim, Seungchul
• Application Number:
  US12/809,472
• Publication Number:
  US 20100272190A1
• Time in Patent Office: Days
• US Class Current: 375/240.260
• CPC Class Codes: H04N 21/234327 by decomposing into layers, e.g. base layer and one or more enhancement layers
• CPC Class Codes: H04N 21/234363 by altering the spatial resolution, e.g. for clients with a lower screen resolution
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/26216 involving the channel capacity, e.g. network bandwidth admission control, resource allocation in open networks H04L12/5692; flow control in packet networks H04L47/10; establishing a schedule or organising the servicing of application requests taking into account QoS H04L67/61
• 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 21/434 Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/4347 Demultiplexing of several video streams
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/6143 involving transmission via a satellite

Abstract

Provided is a scalable transmitting/receiving apparatus and method for improving availability of a broadcasting service, which can allow a reception party to select an optimum video according to an attenuation degree of a broadcasting signal by scalably encoding video data and transmitting it by a different transmission scheme for each layer. The scalable transmitting apparatus for improving availability of a broadcasting service includes: a scalable video encoder for scalably encoding video data to generate scalable video elementary streams having logical layers; a multiplexer for multiplexing the multiple scalable video elementary stream, a compressed audio elementary stream, and program specification information to generate a transport stream; and a scalable transmitter for separating the transport stream into multiple TS packet streams according to pre-given priority information, and transmitting the packet streams by a different transmission scheme for each layer. down-sampler

Claims

1. A scalable transmitting apparatus for improving availability of a broadcasting service, the apparatus comprising:

a scalable video encoder for scalably encoding video data to generate scalable video elementary stream which has logical layers;

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

a scalable transmitter for separating the TS into multiple TSs according to pre-given priority information, and transmitting the packet streams by a different transmission scheme for each layer.

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

3. The scalable transmitting apparatus of claim 2, wherein the scalable transmitter classifies the program specification information and the base-layer video stream as a first layer packet stream to transmit, and classifies the enhancement-layer video stream as a second layer packet stream to transmit.

4. The scalable transmitting apparatus of claim 3, wherein the scalable transmitter applies a lower encoding rate to the first layer packet stream than to the second layer packet stream.

5. The scalable transmitting apparatus of claim 4, wherein the scalable transmitter applies a Quadrature Phase Shift Keying (QPSK) modulation scheme to the first layer packet stream, and applies a Phase Shift Keying (PSK) modulation scheme to the second layer packet stream.

6. The scalable transmitting apparatus of claim 1, wherein the scalable transmitter separates the transport stream into the multiple layers by using program identifications (PIDs) respectively allocated to the packets of the transport stream.

7. A scalable receiving apparatus for improving availability of a broadcasting service, the apparatus comprising:

a scalable receiver for restoring packet streams by each layer from a broadcasting reception signal and combining the restored packet streams to restore a transport stream;

a demultiplexer for demultiplexing the transport stream to split the transport stream into scalable video elementary stream, an audio elementary stream, and program specification information; and

a video decoder for decoding the multiple scalable video streams.

8. The scalable receiving apparatus of claim 7, wherein the scalable receiver de-modulates the broadcasting reception signal to restore a first layer packet stream including a base-layer video stream and program specification information, and a second layer packet stream including an enhancement-layer video stream, and then combines the first layer packet stream and the second layer packet stream in the input order to restore the transport stream.

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

10. The scalable receiving apparatus of claim 9, wherein the demultiplexer checks a packet error on the enhancement-layer video stream, and discards an errored packet.

11. A scalable transmitting method for improving availability of a broadcasting service, the method comprising:

scalably encoding video data to generate scalable video elementary stream;

multiplexing the generated scalable video elementary stream, a compressed audio elementary stream, and program specification information to generate a transport stream; and

separating the transport stream into multiple layers according to pre-given priority information to transmit the packets by a different transmission method for each layer.

12. The scalable transmitting method of claim 11, wherein said encoding of the video data generates a base-layer video elementary stream and an enhancement-layer video elementary stream according to spatial Scalable Video Coding (SVC).

13. The scalable transmitting method of claim 12, wherein said separating of the packets comprises:

classifying the program specification information and the base-layer video stream as a first layer packet stream, and the enhancement video stream as a second packet stream; and

transmitting the first layer packet stream and the second layer packet stream on the same transmission band by different transmission schemes.

14. The scalable transmitting method of claim 13, wherein said transmitting of the first layer packet stream and the second layer packet stream comprising applying a lower encoding rate to the first layer packet stream than to the second layer packet stream.

15. The scalable transmitting method of claim 13, wherein said transmitting of the first layer packet stream and the second layer packet stream comprising applying a Quadrature Phase Shift Keying (QPSK) modulation scheme to the first layer packet stream, and a Phase Shift Keying (PSK) modulation scheme to the second layer packet stream.