digital audio broadcasting block diagram ppt

Ngày tải lên: 23/12/2013, 04:17

... Block Diagram of SwitchBlock Diagram of Switch Mode RegulatorMode Regulator It converts an unregulated dc input...

Ngày tải lên: 13/12/2013, 23:15

Ngày tải lên: 06/07/2014, 07:20

... context of the discussion. 18.2 The Adaptive Filtering Problem Figure 18.1 shows a block diagram in which a sample from a digital input signal x(n) is fed into a device, called an adaptive filter, that ... small audio loudspeaker in a room is estimated. A Gaussian-distributed signal with a flat frequency spectrum over the usable frequency range of the loudspeakeris generated and sent through an audio ... mathematically as y(n) = N  i=1 a i (n)y(n − i) + N  j=0 b j (n)x(n − j), (18.6) although the block diagram does not explicitly represent this system in such a fashion. 1 We could easily write...

Ngày tải lên: 13/12/2013, 00:15

... detection, estimation, filtering, and classification, and in a wide variety of applications such as digital communications, automatic control, radar and sonar, and other engineering disciplines and ... N B samples so that N = KN B .LetX (i) (ω) denote the discrete Fourier transform (DFT) of the ith block {x(t + (i − 1)N B ), 1 ≤ t ≤ N B } (i = 1, 2,···,K)given by X (i) (ω m ) = N B −1  l=0 x(l ... B xxx (ω m ,ω n ) at bifrequency (ω m = 2π N B m, ω n = 2π N B n) as  B xxx (m, n), given by averaging over K blocks  B xxx (m, n) = 1 K K  i=1  1 N B X (i) (ω m )X (i) (ω n )  X (i) (ω m + ω n )  ∗  , (16.17) where...

Ngày tải lên: 13/12/2013, 00:15

... 3/02 • 100346BP Sistema de Módulos de Monitoração Digital 6 www.adc.com • +55-11-3040-0666 Sistema de Módulos de Monitoração Digital Configuração de alta densidade D3C-0016HD Vista frontal Recursos • ... lateral 3/02 • 100346BP Sistema de Módulos de Monitoração Digital 5 www.adc.com • +55-11-3040-0666 Sistema de Módulos de Monitoração Digital Configuração padrão D3C-0024T Vista frontal Recursos • ... frontal www.adc.com • +55-11-3040-0666 3/02 • 100346BP Sistema de Módulos de Monitoração Digital 2 Sistema de Módulos de Monitoração Digital Aplicação O sistema DMM é usado principalmente em ambientes de hospedagem...

Ngày tải lên: 21/12/2013, 06:20

... Flanagan, J.L., Surendran, A.C., and Jan, E E., Spatially selective sound capture for speech and audio processing, Speech Commun., 13: 207–222, 1993. With kind permission of Elsevier Science - ... stable solution to a system of simultaneous equations. Traditional least squares methods need a block of data to calculate the estimate. Most of these methods demand a lot of memory and processing ... traditional methods used to solve Eq. 32.20 are not robust to errors such as round- off errors in digital computers, measurement inaccuracies, and noise corruption. In the least squares solution...

Ngày tải lên: 22/12/2013, 21:17

... shows a more detailed block diagram of the monophonic PAC algorithm, and illustrates the flow of data between the algorithmic blocks. There are five basic parts. FIGURE 42.4: Block diagram of monophonic ... of audio quality [4] PAC was shown to be the best available audio quality choice [4] for audiocompression applications concerning 5-channelaudio. This testevaluatedboth backwardcompatibleaudio ... of standardization is digital audio radio (DAR). In the U.S. this may have one of several realizations: a terrestrial broadcast in the existing FM band, with the digital audio available as an...

Ngày tải lên: 19/01/2014, 19:20

... the six Audio Blocks depending on audio signal bit demand. This feature is particularly useful when the audio signal is non-stationary over the 1536-sample synchronization frame. Audio Blocks ... inaudible. Digital audio compressionisusefulwhereverthereisaneconomicbenefitrealizedbyreducingthe bit-rate. Typical applications are in satellite or terrestrial audio broadcasting, delivery of audio ... parties, including the broadcasting and computer industries. The audio technology used in the ATSC digital audio compression standard [1] is Dolby AC-3. Dolby AC-3 is an audio compression technology...

Ngày tải lên: 19/01/2014, 19:20

... MPEG-2 /Audio Multichannel Coding A logical further step in digital audio is the definition of a multichannel audio representation sys- tem to create a convincing, lifelike soundfield both for audio- only ... ISO/MPEG -audio codec: A generic standard for coding of high quality digital audio, J. Audio Eng. Soc. (AES), 42(10), 780–792, Oct. 1994. [31] van de Kerkhof, L.M. and Cugnini, A.G., The ISO/MPEG audio ... LLC MPEGDigitalAudioCoding Standards PeterNoll TechnicalUniversityofBerlin 40.1Introduction 40.2KeyTechnologiesinAudioCoding AuditoryMaskingandPerceptualCoding • FrequencyDomain Coding • WindowSwitching • DynamicBitAllocation 40.3MPEG-1/AudioCoding TheBasics • LayersIandII • LayerIII • FrameandMultiplex Structure • SubjectiveQuality 40.4MPEG-2/AudioMultichannelCoding MPEG-2/AudioMultichannelCoding • Backward-Compat- ible(BC)MPEG-2/AudioCoding • Advanced/MPEG-2 /Audio Coding(AAC) • SimulcastTransmission • SubjectiveTests 40.5MPEG-4/AudioCoding 40.6Applications 40.7Conclusions References 40.1...

Ngày tải lên: 19/01/2014, 19:20

... Coding Applications” Digital Signal Processing Handbook Ed. Vijay K. Madisetti and Douglas B. Williams Boca Raton: CRC Press LLC, 1999 c  1999byCRCPressLLC [19] Johnston, J.D., Audio coding with ... Conclusions Notwithstanding the successes obtained to date with perceptualcodersfor speech and audio [16, 19, 27,36],thereisstillagreatdealofroomforfurtheradvancement. Themostwidelyappliedperceptual modelstodayapplyanenergy-based ... Moore,B.C.J.andGlasberg,B.R.,Suggestedformulaeforcalculatingauditory-filterbandwidths and excitation patterns, J. Acoust. Soc. Am., 74: 750-757, 1983b. [27] Noll, P., MPEG /Audio coding standards. [28] Reynolds, G.S. and Stevens, S.S., Binaural summation of loudness, J....

Ngày tải lên: 19/01/2014, 19:20

Ngày tải lên: 19/01/2014, 19:20