Digital audio broadcasting, DAB (Download Full Report And Abstract)
#1
Music 

INTRODUCTION

Digital audio broadcasting, DAB, is the most fundamental advancement in radio technology since that introduction of FM stereo radio. It gives listeners interference ” free reception of CD quality sound, easy to use radios, and the potential for wider listening choice through many additional stations and services.

DAB is a reliable multi service digital broadcasting system for reception by mobile, portable and fixed receivers with a simple, non-directional antenna. It can be operated at any frequency from 30 MHz to 3GHz for mobile reception (higher for fixed reception) and may be used on terrestrial, satellite, hybrid (satellite with complementary terrestrial) and cable broadcast networks.

DAB system is a rugged, high spectrum and power efficient sound and data broadcasting system. It uses advanced digital audio compression techniques (MPEG 1 Audio layer II and MPEG 2 Audio Layer II) to achieve a spectrum efficiency equivalent to or higher than that of conventional FM radio.
The efficiency of use of spectrum is increased by a special feature called Single. Frequency Network (SFN). A broadcast network can be extended virtually without limit a operating all transmitters on the same radio frequency.


EVOLUTION OF DAB

DAB has been under development since 1981 of the Institute Fur Rundfunktechnik (IRT) and since 1987 as part of a European Research Project (EUREKA-147).

¢ In 1987 the Eureka-147 consoritium was founded. It™s aim was to develop and define the digital broadcast system, which later became known as DAB.
¢ In 1988 the first equipment was assembled for mobile demonstration at the Geneva WARC conference.
¢ By 1990, a small number of test receivers was manufactured. They has a size of 120 dm3
¢ In 1992, the frequencies of the L and S ” band were allocated to DAB on a world wide basis.
¢ From mid 1993 the third generation receivers, widely used for test purposes had a size of about 25 dm3, were developed.
¢ The fourth generation JESSI DAB based test receivers had a size of about 3 dm3.

1995 the first consumer ” type DAB receivers, developed for use in pilot projects, were presented at the IFA in Berlin.

In short
1992 ” 1995 ” field trial period.
1996 ” 1997 ” introduction period
98 onwards ” terrestrial services in full swing

For DAB via satellite 1996 ” 2001 is planned as experimental stage 2002 ” 2003 introduction period.

DIGITAL AUDIO DATA

The conversion of analog audio data to the digital domain begins by sampling the audio input in regular, discrete intervals of time and quantizing the sampled values into a discrete number of evenly spaced levels. The digital audio data consists of a sequence of binary values representing the number of quantizer levels for each audio sample This method of representing each sample with an independent code word is called pulse code modulation (PCM).

The digital representation of audio data offers many advantages.
¢ High noise immunity
¢ Stability
¢ Reproducibility
¢ Allows the efficient implementation of many audio processing functions (i.e. mixing, filtering, equalization) though the digital computer.

According to the Shannonâ„¢s theory, a time sampled signal can faith represent signal up to half the sampling rate. The max audible frequency for humans is 20 KHz. Therefore the typical sampling rate is 48 KHz. (i.e. more than twice the signal frequency).



DIGITAL AUDIO COMPRESSION

Digital audio compression allows the efficient storage and transmission of audio data. While quantizing, the number of quantizer levels is typically a power of 2 to make full use of a fixed no: of bits per audio sample to represent the quantized values. With uniform quantizer step spacing, each additional bit has the potential of increasing the signal to noise ratio. The typical number of bits per sample used for digital audio is 8, 16, 32, 64. The audio data on a compact disc (2 channels of audio samp1. at 44.1 KHz with 32 bits per sample) requires a data rate of 32x2x44xl000( megabits per second. Ti) transfer this uncompressed data requires a large data transfer rate and a larger bandwidth. Therefore audio data need to be compressed for efficient storage and transmission.

COMPRESSION TECHNIQUES

The MPEG (Motion Picture Experts Group) audio compression algorithm is an International Standardization Organization (ISO) standard for high fidelity audio compression. The high performance of this compression algorithm is due to the exploitation of auditory masking. This masking is a perceptual weakness of the ear that occurs whenever the presence of a strong audio signal in spectral neighborhood of weaker audio signals makes it imperceptible. This noise-masking phenomenon has been observed and corroborated through a variety of psycho acoustic experiments. Due to the specific behaviour of the inner ear, the human auditory system perceives only a small part of the complex audio spectrum. Only those parts of the spectrum located above the masking threshold of a given sound contribute to its perception, where as any acoustic action occurring at the same time but with less intensity and thus situated under the masking threshold will not be heard because it is masked by the main sound event.
Download Full Report And Abstract


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#2
hi
could you please send me the abstract report on dab .
i really need it for my presentation by tomorrow.
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#3


Abstract
Digital Audio Broadcasting is based on the Eureka-147 specification. DAB offers as well as the excellent audio reproduction made possible through digital transmission.
Additionally, it offers significant extra capability for in-car infotainment systems from the large data capability supported by the Eureka standard. In the automotive environment this bandwidth can be deployed for traffic service information, using standards such as RDS-TMC and TPEG.
Also, emerging applications like off-board navigation are very hungry for bandwidth, and with the right server technology in the broadcasting chain DAB offers a very credible alternative to the expensive cellular network for delivering large volumes of data to individual vehicles.

Reference:
http://springerlinkcontent/v13wn41612782057/


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#4
the information provided is really helpful.
thanks
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#5
[attachment=8886]
ABSTRACT
Digital radio broadcasting is a technique which gives listeners interference free reception of high quality sound, easy to use radio, and the potential for wider listening choice through many additional station and services. Current analogue FM radio broadcasting systems in VHF band cannot satisfy demands of future ,such as excellent sound quality, large number of stations and small portable receivers and no quality impairment due to multipath propagation. Digital audio technology has set technical quality standards, which are far beyond those available to radio broadcasting transmitted over the analog FM system. One of its lucrative features is improved mobile radio reception. DAB has the potential to make radio as we know it now as antiquated as the crystal models of a bygone age.
INTRODUCTION
Digital audio broadcasting, DAB, is the most fundamental advancement in radio technology since that introduction of FM stereo radio. It gives listeners interference — free reception of CD quality sound, easy to use radios, and the potential for wider listening choice through many additional stations and services.
DAB is a reliable multi service digital broadcasting system for reception by mobile, portable and fixed receivers with a simple, non-directional antenna. It can be operated at any frequency from 30 MHz to 3GHz for mobile reception (higher for fixed reception) and may be used on terrestrial, satellite, hybrid (satellite with complementary terrestrial) and cable broadcast networks.
DAB system is a rugged, high spectrum and power efficient sound and data broadcasting system. It uses advanced digital audio compression techniques (MPEG 1 Audio layer II and MPEG 2 Audio Layer II) to achieve a spectrum efficiency equivalent to or higher than that of conventional FM radio. The efficiency of use of spectrum is increased by a special feature called Single. Frequency Network (SFN). A broadcast network can be extended virtually without limit a operating all transmitters on the same radio frequency.
EVOLUTION OF DAB
DAB has been under development since 1981 of the Institute Fur Rundfunktechnik (IRT) and since 1987 as part of a European Research Project (EUREKA-147).
• In 1987 the Eureka-147 consoritium was founded. It’s aim was to develop and define the digital broadcast system, which later became known as DAB.
• In 1988 the first equipment was assembled for mobile demonstration at the Geneva WARC conference.
• By 1990, a small number of test receivers was manufactured. They has a size of 120 dm3
• In 1992, the frequencies of the L and S — band were allocated to
DAB on a world wide basis.
• From mid 1993 the third generation receivers, widely used for test purposes had a size of about 25 dm3, were developed.
• The fourth generation JESSI DAB based test receivers had a size of about 3 dm3.
1995 the first consumer — type DAB receivers, developed for use in pilot projects, were presented at the IFA in Berlin.
In short
1992 — 1995 — field trial period.
1996 — 1997 — introduction period
98 onwards — terrestrial services in full swing
For DAB via satellite 1996 — 2001 is planned as experimental stage 2002 —2003 introduction period.
DIGITAL AUDIO DATA
The conversion of analog audio data to the digital domain begins by sampling the audio input in regular, discrete intervals of time and quantizing the sampled values into a discrete number of evenly spaced levels. The digital audio data consists of a sequence of binary values representing the number of quantizer levels for each audio sample This method of representing each sample with an independent code word is called pulse code modulation (PCM).
The digital representation of audio data offers many advantages.
• High noise immunity
• Stability
• Reproducibility
• Allows the efficient implementation of many audio processing functions (i.e. mixing, filtering, equalization) though the digital computer.
According to the Shannon’s theory, a time sampled signal can faith represent signal up to half the sampling rate. The max audible frequency for humans is 20 KHz. Therefore the typical sampling rate is 48 KHz. (i.e. more than twice the signal frequency).
DIGITAL AUDIO COMPRESSION
Digital audio compression allows the efficient storage and transmission of audio data. While quantizing, the number of quantizer levels is typically a power of 2 to make full use of a fixed no: of bits per audio sample to represent the quantized values. With uniform quantizer step spacing, each additional bit has the potential of increasing the signal to noise ratio. The typical number of bits per sample used for digital audio is 8, 16, 32, 64. The audio data on a compact disc (2 channels of audio samp1. at 44.1 KHz with 32 bits per sample) requires a data rate of 32x2x44xl000( megabits per second. Ti) transfer this uncompressed data requires a large data transfer rate and a larger bandwidth. Therefore audio data need to be compressed for efficient storage and transmission.
COMPRESSION TECHNIQUES
The MPEG (Motion Picture Experts Group) audio compression algorithm is an International Standardization Organization (ISO) standard for high fidelity audio compression. The high performance of this compression algorithm is due to the exploitation of auditory masking. This masking is a perceptual weakness of the ear that occurs whenever the presence of a strong audio signal in spectral neighborhood of weaker audio signals makes it imperceptible. This noise-masking phenomenon has been observed and corroborated through a variety of psycho acoustic experiments. Due to the specific behaviour of the inner ear, the human auditory system perceives only a small part of the complex audio spectrum. Only those parts of the spectrum located above the masking threshold of a given sound contribute to its perception, where as any acoustic action occurring at the same time but with less intensity and thus situated under the masking threshold will not be heard because it is masked by the main sound event.
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#6
presented by:
ABHIRUCHI KUMARI

[attachment=10217]
ABSTRACT
Digital radio broadcasting is a technique which gives listeners
interference free reception of high quality sound, easy to use radio, and the potential for wider listening choice through many additional station and services. Current analogue FM radio broadcasting systems in VHF band cannot satisfy demands of future ,such as excellent sound quality, large number of stations and small portable receivers and no quality impairment due to multipath propagation. Digital audio technology has set technical quality standards, which are far beyond those available to radio broadcasting transmitted over the analog FM system. One of its lucrative features is improved mobile radio reception.
INTRODUCTION
Digital audio broadcasting, DAB, is the most fundamental advancement in radio technology since that introduction of FM stereo radio. It gives listeners interference free reception of CD quality sound, easy to use radios, and the potential for wider listening choice through many additional stations and services.DAB is a reliable multi service digital broadcasting system for reception by mobile, portable and fixed receivers with a simple, non-directional antenna.It can be operated at any frequency from 30 MHz to 3GHz for mobile reception (higher for fixed reception) and may be used on terrestrial, satellite,hybrid (satellite with complementary terrestrial) and cable broadcast networks.DAB system is a rugged, high spectrum and power efficient sound and data broadcasting system.
It uses advanced digital audio compression techniques (MPEG 1 Audio layer II and MPEG 2 Audio Layer II) to achieve a spectrum efficiency equivalent to or higher than that of conventional FM radio.The efficiency of use of spectrum is increased by a special feature called Single. Frequency Network (SFN). A broadcast network can be extended virtually without limit a operating all transmitters on the same radio frequency.
EVOLUTION OF DAB
DAB has been under development since 1981 of the Institute For Rundfunktechnik (IRT) and since 1987 as part of a European Research Project (EUREKA-147).
 In 1987 the Eureka-147 consoritium was founded. It’s aim was to develop and define the digital broadcast system, which later became known as DAB.
 In 1988 the first equipment was assembled for mobile
 demonstration at the Geneva WARC conference.
 By 1990, a small number of test receivers was manufactured. They has a size of 120 dm3
 In 1992, the frequencies of the L and S — band were allocated to DAB on a world wide basis.
 From mid 1993 the third generation receivers, widely used for test purposes had a size of about 25 dm3, were developed.
 The fourth generation JESSI DAB based test receivers had a size of about 3 dm3. 1995 the first consumer — type DAB receivers, developed for use in pilot projects, were presented at the IFA in Berlin.
 In short
1992 — 1995 — field trial period.
1996 — 1997 — introduction period
98 onwards — terrestrial services in full swing
For DAB via satellite 1996 — 2001 is planned as experimental stage 2002 —2003 introduction period.
DIGITAL AUDIO DATA
The conversion of analog audio data to the digital domain begins by sampling the audio input in regular, discrete intervals of time and quantizing the sampled values into a discrete number of evenly spaced levels. The digital audio data consists of a sequence of binary values representing the number of quantizer levels for each audio sample This method of representing each sample with an independent code word is called pulse code modulation (PCM
The digital representation of audio data offers many advantages.
• High noise immunity
• Stability
• Reproducibility
Allows the efficient implementation of many audio processing functions (i.e.mixing, filtering, equalization) though the digital computer. According to the Shannon’s theory, a time sampled signal can faith represent signal up to half the sampling rate. The max audible frequency for humans is 20 KHz. Therefore the typical sampling rate is 48 KHz. (i.e. more than twice the signal frequency).
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#7
presented by:
Nikhilesh kumar Tripathi

Definition
DIGITAL AUDIO BROADCASTING

Digital audio broadcasting, DAB, is the most fundamental advancement in radio technology since that introduction of FM stereo radio. It gives listeners interference - free reception of CD quality sound, easy to use radios, and the potential for wider listening choice through many additional stations and services.
DAB is a reliable multi service digital broadcasting system for reception by mobile, portable and fixed receivers with a simple, non-directional antenna. It can be operated at any frequency from 30 MHz to 36Hz for mobile reception (higher for fixed reception) and may be used on terrestrial, satellite, hybrid (satellite with complementary terrestrial) and cable broadcast networks.
DAB system is a rugged, high spectrum and power efficient sound and data broadcasting system. It uses advanced digital audio compression techniques (MPEG 1 Audio layer II and MPEG 2 Audio Layer II) to achieve a spectrum efficiency equivalent to or higher than that of conventional FM radio.
The efficiency of use of spectrum is increased by a special feature called Single. Frequency Network (SFN). A broadcast network can be extended virtually without limit a operating all transmitters on the same radio frequency.
EVOLUTION OF DAB
DAB has been under development since 1981 of the Institute Fur Rundfunktechnik (IRT) and since 1987 as part of a European Research Project (EUREKA-147).
" In 1987 the Eureka-147 consoritium was founded. It's aim was to develop and define the digital broadcast system, which later became known as DAB.
" In 1988 the first equipment was assembled for mobile demonstration at the Geneva WARC conference.
" By 1990, a small number of test receivers was manufactured. They has a size of 120 dm3
" In 1992, the frequencies of the L and S - band were allocated to DAB on a world wide basis.
" From mid 1993 the third generation receivers, widely used for test purposes had a size of about 25 dm3, were developed.
" The fourth generation JESSI DAB based test receivers had a size of about 3 dm3.
1995 the first consumer - type DAB receivers, developed for use in pilot projects, were presented at the IFA in Berlin.

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#8
Heart 
pl send me DAB sem pesentation fileWink
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#9
Hello,
I need your full report on digital audio broadcasting for my M.Tech project.
Plz send me the same ASAP.
Reply
#10
To get more information about the topic "Digital audio broadcasting, DAB (Download Full Report And Abstract) " please refer the page link below

http://studentbank.in/report-digital-aud...d-abstract

http://studentbank.in/report-digital-aud...7#pid55067
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#11
pls send me seminar report and its ppt
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#12

to get information about the topic"Digital audio broadcasting, DAB" please page link bellow
http://studentbank.in/report-digital-aud...d-abstract

http://studentbank.in/report-digital-aud...act?page=2

http://studentbank.in/report-digital-aud...act?page=3

http://studentbank.in/report-digital-aud...oadcasting

http://studentbank.in/report-digital-audio-broadcasting

http://studentbank.in/report-digital-aud...ting--5448

http://studentbank.in/report-digital-aud...ting--7630
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#13
plz send me the report
Reply
#14
to get information about the topic Digital audio broadcasting full report ,ppt and related topic refer the page link bellow

http://studentbank.in/report-digital-aud...d-abstract

http://studentbank.in/report-digital-aud...ting--7630

http://studentbank.in/report-digital-audio-broadcasting

http://studentbank.in/report-digital-aud...oadcasting

http://studentbank.in/report-digital-aud...ting--5448

http://studentbank.in/report-digital-aud...the-future
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#15
send report,ppt on Digital audio broadcasting,
santhoshi[/size][/font]
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#16
to get information about the topic Digital audio broadcasting full report ,ppt and related topic refer the page link bellow

http://studentbank.in/report-digital-aud...d-abstract

http://studentbank.in/report-digital-aud...ting--7630

http://studentbank.in/report-digital-audio-broadcasting

http://studentbank.in/report-digital-aud...oadcasting

http://studentbank.in/report-digital-aud...ting--5448

http://studentbank.in/report-digital-aud...the-future
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