Digital broadcasting transmitter, turbo stream processing method thereof, and digital broadcasting system having the same

Abstract

A digital broadcasting transmitter, a turbo stream processing method thereof, and a digital broadcasting system having the same. The digital broadcasting transmitter includes a first compressor, forming a normal stream by compressing audio and video signals in a first compression format, a second compressor, forming a turbo stream by compressing the audio and video signals in a second compression format, a transport stream (TS) constructor, compressing the turbo stream in an H.264 format and forming the dual transfer stream by multiplexing the normal stream and the turbo stream, and a TS processor, robustly processing the dual transfer stream transmitted from the TS constructor, thus enhancing the transmission efficiency.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects and advantages of the invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a block diagram describing a digital broadcasting transmitter according to an embodiment of the present invention;

FIG. 2 is a block diagram describing the TS constructor of FIG. 1;

FIGS. 3A through 3D are views describing an H.264 packet constructed in the TS constructor of FIG. 2;

FIG. 4 is a flow chart describing a turbo stream processing method of a digital broadcasting transmitter according to an embodiment of the present invention; and

FIG. 5 is a block diagram of a digital broadcasting receiver according to an embodiment of the present invention.

Claims

1. A digital broadcasting transmitter, comprising: a first compressor, forming a normal stream by compressing audio and video signals in a first compression format;a second compressor, forming a turbo stream by compressing the audio and video signals in a second compression format;a transport stream (TS) constructor, compressing the turbo stream in an H.264 format and forming a dual transfer stream by multiplexing the normal stream and the compressed turbo stream; anda TS processor, robustly processing the dual transfer stream transmitted from the TS constructor.

2. The digital broadcasting transmitter of claim 1, wherein the first compression format comprises an MPEG-2 (Moving Picture Experts Group-2) format.

3. The digital broadcasting transmitter of claim 1, wherein the second compression format comprises an H.264 format.

4. The digital broadcasting transmitter of claim 1, wherein the TS constructor comprises: an RS encoder RS-encoding the compressed turbo stream;a place holder maker adding a region to insert a parity to the RS-encoded turbo stream;an interleaver, interleaving the turbo stream with the region to insert the parity; anda TS multiplexer (MUX), multiplexing the interleaved turbo stream and the normal stream.

5. A turbo stream processing method of a digital broadcasting transmitter, comprising: forming a normal stream by compressing audio and video signals in a first compression format;forming a turbo stream by compressing the audio and video signals in a second compression format;forming a dual transfer stream by compressing the turbo stream and multiplexing the normal stream and the compressed turbo stream; androbustly processing the dual transfer stream.

6. The turbo stream processing method of claim 5, wherein the first compression format comprises an MPEG-2 (Moving Picture Experts Group-2) format.

7. The turbo stream processing method of claim 5, wherein the second compression format comprises an H.264 format.

8. The turbo stream processing method of claim 5, wherein the forming of the dual transfer stream comprises: RS-encoding the compressed turbo stream;adding a region to insert a parity to the RS-encoded turbo stream;interleaving the turbo stream with the region to insert the parity; andmultiplexing the interleaved turbo stream and the normal stream.

9. A digital broadcasting system, comprising: a transmitter, constructing a dual transfer stream by multiplexing a normal stream of a first compression format and a turbo stream of a second compression format, robust-processing the dual transfer stream and outputting a robust-processed dual transfer stream; anda receiver, receiving and decoding the robust-processed dual transfer stream and recovering the normal stream and the turbo stream.

10. The digital broadcasting system of claim 9, wherein the first compression format comprises an MPEG-2 (Moving Picture Experts Group-2) format.

11. The turbo stream processing method of claim 9, wherein the second compression format comprises an H.264 format.

12. The digital broadcasting system of claim 9, wherein the transmitter comprises: a first compressor, forming the normal stream by compressing audio and video signals in the first compression format;a second compressor, forming the turbo stream by compressing the audio and video signals in the second compression format;a TS constructor, forming the dual transfer stream by multiplexing the normal stream and the turbo stream; anda TS processor, robust-processing the dual transfer stream received from the TS constructor.

13. The digital broadcasting transmitter of claim 1, wherein the TS processor comprises: a randomizer, to randomize the dual transfer stream;a Reed-Solomon (RS) encoder, to RS-encode the dual transfer stream randomized by the randomizer;a data interleaver, to interleave the dual transfer stream RS-encoded by the RS encoder;a turbo processor, to robustly process the dual transfer stream interleaved by the data interleaver;a trellis encoder, to trellis-encode the robustly processed dual transfer stream; anda multiplexer (MUX), to multiplex the trellis-encoded dual transfer stream by adding a segment sync and a field sync.

14. The digital broadcasting transmitter of claim 13, wherein the TS processor further comprises: a pilot inserter, to add a pilot signal to the multiplexed dual transfer stream;a modulator to perform pulse-shaping for the dual transfer stream having the added pilot signal, to load the dual transfer stream having the added pilot signal into an intermediate frequency carrier wave, and to perform VSB modulation to modulate the amplitude, anda radio frequency (RF) converter, to RF convert and amplify the dual transfer stream VSB-modulated by the modulator, and transmit the transfer stream through a channel allocated to a certain band.

15. The digital broadcasting transmitter of claim 12, wherein the RS-encoder is a concatenated coder which adds a parity to the dual transfer stream to correct errors created when transmitting the dual transfer stream.

16. The digital broadcasting transmitter of claim 12, wherein the data interleaving changes a location of a frame in a frame of data.

17. The digital broadcasting transmitter of claim 12, wherein the turbo processor separates the dual transfer stream into the normal stream and the turbo stream, passes the normal stream, turbo-codes the turbo stream, and multiplexes and outputs the normal stream and the turbo-coded turbo stream.

18. The digital broadcasting transmitter of claim 12, wherein the trellis encoder converts the dual transfer stream into a symbol, and performs symbol-mapping through trellis-encoding of certain rates.

19. A digital broadcasting system comprising: a transmitter, forming a dual transfer stream by multiplexing a normal stream of an MPEG-2 (Moving Experts Group-2) format and a turbo stream of an H.264 format, robust-processing the dual transfer stream and outputting the robust-processed dual transfer stream; anda receiver, receiving and decoding the robust-processed dual transfer stream and recovering the normal stream and the turbo stream.

20. The digital broadcasting system of claim 19, wherein the transmitter comprises: a first compressor, forming the normal stream by compressing audio and video signals in the MPEG-2 (Moving Experts Group-2) format;a second compressor, forming the turbo stream by compressing the audio and video signals in the H.264 format;a TS constructor, forming the dual transfer stream by multiplexing the normal stream and the turbo stream; anda TS processor, robust-processing the dual transfer stream received from the TS constructor.