Áp dụng DSP lập trình trong truyền thông di động P14 pot

... the encoded digital audio. The audio encoder dynamically measures audio complexity and adjusts data throughput accordingly, without compromising the quality of the encoded digital audio [8]. The ... (synchronization) † Decoding of the FIC † Time and frequency de-interleaving and Viterbi decoding † Audio source decoding from MPEG 1 Layer II (MUSICAM) coded audio to linear PCM audio Demodulatio...

Ngày tải lên: 01/07/2014, 17:20

... real-time DSP in an application, the implemen- tation of a DSP solution involves the use of many ingredients: analog to digital converters, digital to analog converters, ASIC, memories, DSPs, microcontrollers, ... therefore centered more on ‘‘ disguising a RISC processor as a DSP ’ or using small DSP coprocessors. In the case of the latter, the excess burden of the DSP Enabling Multi...

Ngày tải lên: 01/07/2014, 17:20

... applications. Improved coding efficiency can be obtained by coding the difference between consecutive samples, using a method called differential PCM (DPCM). In predictive coding, the differ- ence that ... of immediately preceding samples: ~ sðnÞ¼ X p k¼1 aðkÞ sðn 2 kÞ; where ~ sðnÞ is the predicted value of s(n), a(k), 1 # k # p are the predictor coefficients, and p is the order of the predict...

Ngày tải lên: 01/07/2014, 17:20

... C54x fixed-point DSP is a signal processor commonly used in cellular phones, digital audio players, and other low-power communications devices [4]. The TI core uses an advanced modified Harvard architecture ... TMS320C6204, Fixed Point Digital Signal Processor, Document SPRS152A, October 2000, Revised June 2001. [13] Verbauwhede, I., Nicol, C., ‘Low Power DSP s for Wireless Communications,’...

Ngày tải lên: 01/07/2014, 17:20

... DSPs in Mobile Communications356 Figure 17.20. Die photo of Maia sing elements. An example of this approach is the two-level network structure used in the PADDI-2 multiprocessor [10]. In PADDI-2, ... token of a one-dimensional data structure or the last data token of a one-dimensional sub-structure of a two-dimensional data structure. The value 2 marks the last data token of a two-dimensional...

Ngày tải lên: 01/07/2014, 17:20

... System Use of the DSP in pointing designs will vary depending on the actual DSP/ MCU combination within the cell-phone and on the scheduling and duration of other DSP tasks. DSP loading will determine ... Power on the heading sensing circuit 2. Reset each axis of the heading sensor 3. Take a number of heading readings (number is based on available time) 4. Average the heading readings...

Ngày tải lên: 01/07/2014, 17:20

... focusing on signal processing DSP designers have put programmable DSPs at the heart of many consumer devices, including mobile communica- tion systems. Recently DSPs have been specialized to ... past and in the future. We highlight different perspectives, especially regarding implementation issues, in the processing of speech, audio, video, future multimedia and location-based services as ....

Ngày tải lên: 01/07/2014, 17:20

... power consumption of the DSP. In addition, parallelism can be used to increase the number of The Application of Programmable DSPs in Mobile Communications18 Figure 2.5 Power dissipation trends in DSP 1976, ... in GSM, in ’Applications of Digital Signal Processing’, Proceedings of DSP9 4 UK, 1994, and in Technologist Proceedings, Herzlya, Israel, November 1995. The History of DSP Based A...

Ngày tải lên: 01/07/2014, 17:20

... to the DSP through a standardized interface. Therefore TCCs benefit from the DSP addressing capability, DSP address/data bus bandwidth, internal registers and common DSP memory space. Additionally ... Channel CDMA Code Division Multiple Access DBB Digital Base Band DLL Delay Locked Loop DSP Digital Signal Processor ETSI European Telecommunications Standards Institute FDD Frequency Di...

Ngày tải lên: 01/07/2014, 17:20

... they are closely related. The most DSP intensive functions are the two types of channel decoding: convolutional decoding and turbo decoding. Convolutional encoding is used for low data rate frames ... with a DSP was also achieved by memory mapping the device, by allowing block data transfers for input and/or output to be simultaneous with decoding, and by providing various signal lines fo...

Ngày tải lên: 01/07/2014, 17:20