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Method of transmitting and receiving digital broadcasting signal and reception system

A receiving system and encoding method technology, applied in the field of digital broadcasting, can solve the problems of unable to output audio signals, small number of audio services, low compression ratio, etc., and achieve the effect of improving data transmission efficiency

Inactive Publication Date: 2009-02-25
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] First, because conventional encoding methods use lower compression ratios than recently developed and utilized audio compression techniques, the number of audio services that can be transmitted in a specific frequency band is relatively small
[0011] Conventionally, when transmitting broadcast streams compressed using various encoding methods, existing broadcast receivers cannot decode the transmitted broadcast streams
This is because existing broadcast receivers are only capable of decoding broadcast streams compressed using a single audio encoding method
[0012] Second, conventional digital broadcast receivers cannot output audio signals compressed using various audio encoding methods

Method used

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  • Method of transmitting and receiving digital broadcasting signal and reception system
  • Method of transmitting and receiving digital broadcasting signal and reception system
  • Method of transmitting and receiving digital broadcasting signal and reception system

Examples

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no. 1 example

[0047] FIG. 1 is a view schematically showing an FIC and an MSC of a digital broadcast signal according to an embodiment of the present invention.

[0048] Hereinafter, a method of delivering more audio services in an MSC will be schematically described with reference to FIG. 1 . The implementation method according to the present invention can be understood through the second to sixth embodiments.

[0049] As shown in Figure 1, in the present invention, audio services compressed using the Masked Adaptive Universal Subband Integrated Coding and Multiplexing (MUSICAM) audio coding method and some audio compressed using alternative audio coding methods can be transmitted in the MSC Serve.

[0050] For convenience of description, in the present invention, an audio service compressed using the MUSICAM audio encoding method is referred to as MUSICAM audio (MA), and an audio service compressed using an alternative audio encoding method is referred to as alternative audio (AA).

[0...

no. 2 example

[0061] FIG. 2 is a view showing the structure of a fast information block (FIB) of digital broadcasting.

[0062] FIG. 3 is a view showing the structure of a Fast Information Group (FIG) in the FIB.

[0063] FIG. 4 is a view showing service organization when the FIG type is 0 and the extension field is 2. Referring to FIG.

[0064] Hereinafter, concepts of FIC, FIB, and FIG will be briefly described with reference to FIGS. 2 to 4 (together with FIG. 1 ).

[0065] FIC includes FIB.

[0066] As shown in FIG. 2, the FIB has 256 bits and includes a FIB data field and a cyclic redundancy check (CRC).

[0067] The FIB data field includes one or more of FIG, end marker and padding.

[0068] Each FIG includes a FIG header and a FIG data field, and the FIG header includes a FIG type and a length.

[0069] When the FIG type is 0, the FIG application can indicate information on MCI and SI.

[0070] When the FIG type is 0, the FIG data fields include a current / next (C / N) field, an ot...

no. 3 example

[0091] According to one embodiment of the present invention, the alternative coding information of the currently transmitted audio service component is defined in the ASCTy field. The ASCTy field is passed to the FIC of the transport frame and the actual audio traffic component is passed to the MSC.

[0092] That is, an alternative audio coding method of an audio service component transmitted through the MSC can be confirmed using a value assigned to the ASCTy field.

[0093] The ASCTy field indicates a value for identifying an audio service component encoded using the MUSICAM audio encoding method or another encoding method.

[0094] Accordingly, a broadcast receiver can decode audio service components compressed and transmitted using various encoding methods by parsing the ASCTy field.

[0095] FIG. 5 is a view showing a value of an ASCTy field according to an embodiment of the present invention.

[0096] FIG. 6 is a view showing values ​​of ASCTy according to another embo...

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Abstract

Disclosed are a method of providing more digital broadcasting services in a restricted frequency band and a reception system thereof. The reception system includes a tuner which receives a service component and identification information for identifying an alternative coding method of the service component; an extraction unit which parses the received identification information and extracts the alternative coding method of the service component; a controller which controls a decoder corresponding to the extracted alternative coding method to decode the received service component; and the decoder which decodes the received service component under the control of the controller.

Description

technical field [0001] The present invention relates to digital broadcasting, and more particularly, to a method and receiving system for transmitting and receiving digital broadcasting signals. Background technique [0002] Recently, research on devices for transmitting, receiving, and displaying audio broadcasting signals, video broadcasting signals, and data broadcasting signals using digital methods rather than analog methods has become active and some devices are being commercialized. [0003] For example, a broadcasting scheme that transmits audio broadcasting signals, video broadcasting signals, and data broadcasting signals using a digital method is called digital broadcasting. [0004] Digital broadcasting may eg be digital audio broadcasting or digital multimedia broadcasting. [0005] Digital broadcasting can provide various multimedia information services at low cost, and can be used for mobile broadcasting by allocating frequency bands. Digital broadcasting ca...

Claims

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Application Information

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IPC IPC(8): H04N7/24G10L19/00G10L19/008G10L19/16G10L19/20H04N5/00
CPCH04N21/4345G10L19/167G10L19/20H04N21/4382G10L19/008H04H20/89H04H2201/20
Inventor 李哲秀
Owner LG ELECTRONICS INC
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