KR20110026730A - Service method of digital tv broadcasting - Google Patents

Service method of digital tv broadcasting Download PDF

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Publication number
KR20110026730A
KR20110026730A KR1020090084497A KR20090084497A KR20110026730A KR 20110026730 A KR20110026730 A KR 20110026730A KR 1020090084497 A KR1020090084497 A KR 1020090084497A KR 20090084497 A KR20090084497 A KR 20090084497A KR 20110026730 A KR20110026730 A KR 20110026730A
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KR
South Korea
Prior art keywords
broadcast
digital
broadcasting
fixed
fixed digital
Prior art date
Application number
KR1020090084497A
Other languages
Korean (ko)
Inventor
임석근
Original Assignee
삼성전기주식회사
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Publication date
Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020090084497A priority Critical patent/KR20110026730A/en
Publication of KR20110026730A publication Critical patent/KR20110026730A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/57—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for mobile receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/27—Arrangements for recording or accumulating broadcast information or broadcast-related information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

Provided are a method for providing a digital TV broadcast capable of seamlessly watching TV by switching between a high-quality fixed digital TV broadcast and a mobile digital TV broadcast capable of watching TV even at high speed. The digital TV broadcasting providing method includes searching and storing channels of fixed digital TV broadcasting and mobile digital TV broadcasting, receiving the fixed digital TV broadcasting, and monitoring signal quality characteristics of the fixed digital TV broadcasting. Comparing the signal quality characteristic of the fixed digital TV broadcast with a preset reference value; and if the signal quality characteristic of the fixed digital TV broadcast is smaller than a preset reference value, stopping the reception of the fixed digital TV broadcast and stopping the mobile digital TV. It may include receiving a broadcast.

Description

SERVICE METHOD OF DIGITAL TV BROADCASTING}

The present invention relates to a method for providing digital TV broadcasting, and more particularly, to a method of providing digital TV broadcasting capable of seamlessly watching TV by switching between high quality fixed digital TV broadcasting and mobile digital TV broadcasting capable of watching TV even at high speed. It is about.

Recently, as TV broadcasting begins, analog TV broadcasting, which has been in service until now, is rapidly shifting to digital TV broadcasting. In the case of the US, all TV broadcasts were converted into digital TVs in June 2009. Korea plans to convert all TV broadcasts to digital TV broadcasts in 2012, and is currently in the process of converting digital TV broadcasts.

These digital TV broadcasts are promoting services by selecting different standards in the US, Europe, and Japan. For example, the United States and Korea adopt the Advanced Television Systems Committee (ATSC) standard, Europe adopts the Digital Video Broadcasting-Multimedia Home Platform (DVB) standard, and in Japan, the Integrated Services Digital Broadcasting (ISDB) standard. Is adopted.

In addition, these digital TV broadcasting standards provide terrestrial broadcasting that can be received by fixed digital TV by providing high-quality video services, and the video quality is slightly lower than that of terrestrial broadcasting, but TV reception is not interrupted even during high-speed movement. This includes standards for portable digital TV broadcasting. For example, ATSC-M / H and DVB-H are standards for mobile digital TV broadcasting of the ATSC and DVB standards, respectively. In ISDB, twelve segments represent the entire frequency band allocated by ISDB-T, the standard for terrestrial broadcasting. In the fixed digital TV broadcasting, the broadcast service is provided using all 12 segments, whereas the mobile digital TV broadcasting provides a standard of using only one segment of the 12 segments.

On the other hand, mobile devices capable of receiving TV recently, for example, handheld PCs (HHPs) or portable media players (PMPs), etc., have become larger and higher in size, and can receive high quality fixed digital TV broadcasts using mobile devices. It became. However, when a high-speed (eg, 30 km or more) mobile environment is encountered while receiving a high quality fixed digital TV broadcast using such a mobile device, a problem occurs that the TV reception is impossible.

The present invention has been made in an effort to provide a digital TV broadcast providing method capable of seamlessly watching TV by switching between high quality fixed digital TV broadcasting and mobile digital TV broadcasting capable of watching TV even at high speed.

According to an aspect of the present invention,

Searching for and storing channels of fixed digital TV broadcasting and mobile digital TV broadcasting;

Receiving the fixed digital TV broadcast;

Monitoring signal quality characteristics of the fixed digital TV broadcast;

A first comparing step of comparing a signal quality characteristic of the fixed digital TV broadcast with a preset reference value; And

When the signal quality characteristic of the fixed digital TV broadcast is smaller than a preset reference value, stopping receiving the fixed digital TV broadcast and receiving the mobile digital TV broadcast.

It provides a digital TV broadcast providing method comprising a.

According to one embodiment of the present invention, after the step of receiving the mobile digital TV broadcast, the second comparison step of comparing the signal quality characteristic of the fixed digital TV broadcast with a preset reference value and the signal quality characteristic of the fixed digital TV broadcast The method may further include stopping the reception of the mobile digital TV broadcast and receiving the fixed digital TV broadcast when the reference value is larger than the preset reference value.

In one embodiment of the present invention, the signal quality characteristic of the fixed digital TV broadcast may be at least one of a bit error rate, a noise to signal ratio, and a received signal strength value of the signal of the fixed digital TV broadcast.

In one embodiment of the present invention, the step of receiving the mobile digital TV broadcast, the channel of the mobile digital TV broadcast comprising the same content as the content received through the broadcast channel being received in the step of receiving the fixed digital TV broadcast It may be a step of receiving a mobile digital TV broadcast by selecting.

In one embodiment of the present invention, the fixed digital TV broadcast may be a 12-segment TV broadcast of the ISDB-T standard, and the mobile digital TV broadcast may be a 1-segment TV broadcast of the ISDB-T standard.

According to the present invention, even when the user receives and watches a high-quality fixed digital TV broadcast, the user can automatically switch to the mobile digital TV broadcast to watch even if the user moves at a high speed, even when there is no separate operation such as channel search and channel selection. There is an effect that can continuously receive digital TV broadcast.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Embodiment of this invention is provided in order to demonstrate this invention more completely to the person skilled in the art to which this invention belongs. Therefore, it should be noted that the shape and size of the components shown in the drawings may be exaggerated for more clear explanation.

1 is a flowchart illustrating a digital TV broadcasting providing method according to an embodiment of the present invention.

As shown in FIG. 1, the method for providing digital TV broadcasting according to an embodiment of the present invention includes searching for and storing channels of fixed digital TV broadcasting and mobile digital TV broadcasting (S11), and the fixed digital TV broadcasting. Receiving a signal (S12), monitoring the signal quality characteristic of the fixed digital TV broadcast (S13), and comparing the signal quality characteristic of the fixed digital TV broadcast with a preset reference value (S14); If the signal quality characteristic of the fixed digital TV broadcast is smaller than a predetermined reference value, the method may include stopping the reception of the fixed digital TV broadcast and receiving the mobile digital TV broadcast (S15).

In addition, an embodiment of the present invention provides a second comparison step (S16) of comparing the signal quality characteristic of the fixed digital TV broadcasting with a preset reference value, and the signal quality characteristic of the fixed digital TV broadcasting is greater than a preset reference value. In the case of stopping the reception of the mobile digital TV broadcast, the method may further include receiving the fixed digital TV broadcast (S12).

2 is a block diagram illustrating an example of a digital TV broadcast receiver to which a digital TV broadcast providing method according to an embodiment of the present invention is applied. 2 is an example of a receiver structure of a TV using the ISDB-T standard used in Japan.

An example of the TV receiver shown in FIG. 2 includes an antenna 21, an RF processor 22 for converting an RF signal received from the antenna into a base band, and a base band processor 23 for demodulating the signal converted to a base band. And a broadcast signal processor 24 for outputting a demodulated signal, storing the searched channel, and controlling an operation of the baseband processor 23 for selecting one of a fixed digital TV broadcast reception and a mobile digital TV broadcast reception. Can be.

Hereinafter, the operation and effect of the present invention will be described in more detail with reference to FIGS. 1 and 2.

One embodiment of the invention begins with a step S11 of first searching for and storing channels of fixed digital TV broadcasting and mobile digital TV broadcasting. The broadcast signal processor 24 of the digital TV broadcast receiver scans a channel of a digital TV broadcast that can be received by scanning signals received from an antenna and stores the retrieved channel information. The retrieved channel information may be stored in a storage area of the broadcast signal processor 24 or separately in a memory unit (not shown) provided externally. The stored channel information may be referred to so that broadcast on the same content may be performed when the fixed digital TV broadcast and the mobile digital TV broadcast are switched to each other.

Subsequently, a fixed digital TV broadcast, which is a high quality broadcast, may be received (S12). The fixed digital TV broadcast may be, for example, a digital TV broadcast received using all 12 frequency segment bands in the Japanese standard ISDB-T standard. The RF signal for digital TV broadcast received by the antenna 21 is down converted by the RF processor 22 and converted into a baseband signal. The TV broadcast signal converted into the baseband signal is demodulated according to the modulation scheme used for transmission by the baseband processor 23. The ISDB-T standard divides the frequency band into 12 segments, uses 12 segments for fixed digital TV broadcasting, and 1 segment for mobile digital TV broadcasting. Therefore, in the demodulator 231 for demodulating a signal using the input 12 segments, a signal for fixed digital TV broadcasting is demodulated and output, and in the demodulator 232 for demodulating only one of the segments, the mobile type is mobile. A signal for digital TV broadcasting may be demodulated and output. That is, a receiver according to the ISDB-T standard may receive one RF signal from an antenna and demodulate both a fixed digital TV broadcast signal and a mobile digital TV broadcast signal including the same content. The demodulated signal is transmitted to the broadcast signal processor 24, and the broadcast signal processor 24 outputs a video signal for displaying a TV broadcast signal of a type desired by the user on a display and an audio signal that can be output to a speaker. can do.

Next, the broadcast signal processor 24 continuously analyzes the signal input from the baseband processor 23 to continuously monitor signal quality characteristics of the digital TV broadcast (S13). This monitoring can be done for both fixed digital TV broadcast signals and mobile digital TV broadcast signals. The present invention is to provide a fixed digital TV broadcasting that can listen to a higher quality broadcast preferentially, and to provide a mobile digital TV broadcasting in an environment where viewing of the fixed digital TV broadcasting is not possible, so that the signal quality characteristics of the fixed digital TV broadcasting are improved. It is preferable to perform switching of digital TV broadcasting as a reference.

Subsequently, a signal quality characteristic of the fixed digital TV broadcast is compared with a preset reference value (S14). The broadcast signal processor 24 may continuously compare the signal quality characteristics of the fixed digital TV broadcast detected through monitoring with a preset reference value. In this step S14, the signal quality characteristic of the fixed digital TV broadcast may use at least one of a bit error rate (BER), a signal-to-noise ratio (SNR), and a received signal strength value (RSSI). Since the bit error rate may be a signal quality characteristic that best reflects the image quality in digital TV broadcasting, it is preferable to determine the signal quality of the fixed digital broadcast using the bit error rate.

As a result of the comparison in step S14, when the signal quality characteristic of the fixed digital TV broadcast is smaller than a preset reference value, the reception of the fixed digital TV broadcast may be stopped and the mobile digital TV broadcast may be received (S15). That is, when the signal quality characteristic of the fixed digital TV broadcast is smaller than the reference value in the broadcast signal processing unit 24, it is determined that it is difficult to watch a good digital TV broadcast (for example, a high-speed mobile environment of 30 km or more) and is a mobile digital TV. The video signal and the audio signal may be separately generated from the demodulated signal of the broadcast and output to the display and the speaker, respectively. In the switching of the broadcasting scheme, in step S12 of receiving the fixed digital TV broadcast, the mobile digital TV broadcast is selected by selecting a channel of the mobile digital TV broadcast including the same content as the content received through the broadcast channel being received. By doing so, the user can watch the broadcast of the channel being watched without interruption. In step S15, the signal quality characteristics of the fixed digital TV broadcasting are smaller than the reference value in order to prevent the broadcast switching from occurring when the signal quality characteristics of the fixed digital TV broadcasting are temporarily deteriorated by the momentary disturbance. When the maintained time is longer than the preset reference time, it may be implemented by switching to receive the mobile digital TV broadcast.

As described above, the present invention can enable continuous viewing of the broadcast being watched by switching to automatically receive the mobile digital TV broadcast in an environment where it is impossible or difficult to receive the fixed digital TV broadcast.

Even after the reception broadcast is switched to the mobile digital TV broadcast in step S15, signal quality characteristic monitoring of the fixed digital TV broadcast performed in step S13 is continuously performed. Through this monitoring, it is possible to continuously compare the signal quality characteristics of the fixed digital TV broadcasting with the preset reference value (S16), and if the signal quality characteristic of the fixed digital TV broadcasting is larger than the preset reference value as a result of the comparison in step S16, The digital TV broadcast is stopped and the fixed digital TV broadcast is received again (S12). As in the above-described step (S15), the signal quality characteristics of the fixed digital TV broadcasting is changed to prevent the broadcast switching from occurring when the signal quality characteristic of the fixed digital TV broadcasting is temporarily improved by the momentary disturbance. When the time that is kept larger than the reference value is longer than the preset reference time, it may be implemented by switching to receive the fixed digital TV broadcast again.

As such, the present invention can provide digital TV broadcasting of the highest quality within the range allowed by the TV viewing environment in which the user is located.

In the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the following claims and their equivalents.

1 is a flowchart illustrating a digital TV broadcast providing method according to an embodiment of the present invention.

2 is a block diagram showing an example of a digital TV broadcast receiver to which a digital TV broadcast providing method according to an embodiment of the present invention is applied.

* Description of the symbols for the main parts of the drawings *

21: antenna 22: RF processing unit

23: baseband processor 24: broadcast signal processor

Claims (5)

Searching for and storing channels of fixed digital TV broadcasting and mobile digital TV broadcasting; Receiving the fixed digital TV broadcast; Monitoring signal quality characteristics of the fixed digital TV broadcast; A first comparing step of comparing a signal quality characteristic of the fixed digital TV broadcast with a preset reference value; And When the signal quality characteristic of the fixed digital TV broadcast is smaller than a preset reference value, stopping receiving the fixed digital TV broadcast and receiving the mobile digital TV broadcast. Digital TV broadcast providing method comprising a. The method of claim 1, wherein after receiving the mobile digital TV broadcast, A second comparison step of comparing a signal quality characteristic of the fixed digital TV broadcast with a preset reference value; And And stopping the reception of the mobile digital TV broadcast and receiving the fixed digital TV broadcast when the signal quality characteristic of the fixed digital TV broadcast is larger than a preset reference value. The method of claim 1, And a signal quality characteristic of the fixed digital TV broadcast is at least one of a bit error rate, a noise to signal ratio, and a received signal strength value of the signal of the fixed digital TV broadcast. The method of claim 1, wherein receiving the mobile digital TV broadcast comprises: Receiving the fixed digital TV broadcast by receiving a mobile digital TV broadcast by selecting a channel of the mobile digital TV broadcast including the same content as the content received through the broadcast channel being received in the fixed digital TV broadcast. How to Provide. The method of claim 1, The fixed digital TV broadcast is a 12-segment TV broadcast of the ISDB-T standard, and the mobile digital TV broadcast is a 1-segment TV broadcast of the ISDB-T standard.
KR1020090084497A 2009-09-08 2009-09-08 Service method of digital tv broadcasting KR20110026730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090084497A KR20110026730A (en) 2009-09-08 2009-09-08 Service method of digital tv broadcasting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090084497A KR20110026730A (en) 2009-09-08 2009-09-08 Service method of digital tv broadcasting

Publications (1)

Publication Number Publication Date
KR20110026730A true KR20110026730A (en) 2011-03-16

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KR1020090084497A KR20110026730A (en) 2009-09-08 2009-09-08 Service method of digital tv broadcasting

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