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Words starting with dspart

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  • dsp32 assembly language — A high-level assembly language for the DSP32 Programmable DSP Chip.
  • dsp56000 — A digital signal processing chip from Motorola. An assembler called a56 and a port of gcc called dsp56k-gcc are available.
  • dsp56001 — A digital signal processing chip from Motorola. An assembler called a56 is available.
  • dspl — Digital Signal Processing Language
  • dsp — Digital Signal Processing
  • dsp56165-gcc — A port of gcc version 1.40 to the Motorola DSP56156 and DSP56000 by Andrew Sterian <[email protected]>.
  • dsp56k-gcc — Motorola's port of gcc version 1.37.1 to the Motorola DSP56000.
  • ds level — (communications)   (Digital Signal or Data Service level) Originally an AT&T classification of transmitting one or more voice conversations in one digital data stream. The best known DS levels are DS0 (a single conversation), DS1 (24 conversations multiplexed), DS1C, DS2, and DS3. By extension, the DS level can refer to the raw data rate necessary for transmission: DS0 64 Kb/s DS1 1.544 Mb/s DS1C 3.15 Mb/s DS2 6.31 Mb/s DS3 44.736 Mb/s DS4 274.1 Mb/s (where K and M signify multiplication by 1000 and 1000000, rather than powers of two). In this sense it can be used to measure of data service rates classifying the user access rates for various point-to-point WAN technologies or standards (e.g. X.25, SMDS, ISDN, ATM, PDH). Japan uses the US standards for DS0 through DS2 but Japanese DS5 has roughly the circuit capacity of US DS4, while the European standards are rather different (see E1). In the US all of the transmission rates are integral multiples of 8000 bits per second but rates above DS1 are not necessarily integral multiples of 1,544 kb/s.
  • ds0 — (communications)   The zeroth DS level, having a transmission rate of 64,000 bits per second (64 kb/s), intended to carry one voice channel (a phone call).
  • ds1 — (communications)   A DS level and framing specification for synchronous digital streams, over circuits in the North American digital transmission hierarchy, at the T1 transmission rate of 1,544,000 bits per second (baud). DS1 is commonly used to multiplex 24 DS0 channels. Each DS0 channel, originally a digitised voice-grade telephone signal, carries 8000 bytes per second (64,000 bits per second). A DS1 frame includes one byte from each of the 24 DS0 channels and adds one framing bit, making a total of 193 bits per frame at 8000 frames per second. The result is 193*8000 = 1,544,000 bits per second. In the original standard, the successive framing bits continuously repeated the 12-bit sequence 110111001000, and such a 12-frame unit is called a super-frame. In voice telephony, errors are acceptable (early standards allowed as much as one frame in six to be missing entirely), so the least significant bit in two of the 24 streams was used for signaling between network equipments. This is called robbed-bit signaling. To promote error-free transmission, an alternative called the extended super-frame (ESF) of 24 frames was developed. In this standard, six of the 24 framing bits provide a six bit cyclic redundancy check (CRC-6), and six provide the actual framing. The other 12 form a virtual circuit of 4000 bits per second for use by the transmission equipment, for call progress signals such as busy, idle and ringing. DS1 signals using ESF equipment are nearly error-free, because the CRC detects errors and allows automatic re-routing of connections. Compare T-carrier systems.