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Topic: Isochronous signal

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	Media access control for isochronous data packets in carrier sensing multiple access systems - US Patent 6339584 (Site not responding. Last check: 2007-11-04)
		Isochronous data from a packet is buffered in FIFO 41 until frame interrupt handler 52 is ready to process the data.
		The isochronous data packets are followed by asynchronous data packets 120, and the asynchronous data packets are followed by an idle network test period 122.
		The isochronous channel count is provided in the beat packet and corresponds to the number of entries on the isochronous packet permission list, which is the number of expected isochronous channel packets to be transmitted during the frame.
	www.patentstorm.us /patents/6339584.html (10346 words)

	Quatech \| Isochronous Serial Commmunication Overview
		Isochronous clocking information is derived from or included in the data stream, and the delay factor is dependent on a channel's characteristics and can be logically determined.
		Isochronous communication is best suited for applications where a steady data stream is more important than accuracy.
		To ensure that isochronous transfers are not bogged down by other devices, the USB specification sets aside bandwidth for them.
	www.quatech.com /support/comm-over-isochserial.php (206 words)

	Isochronous signal - Wikipedia, the free encyclopedia
		In telecommunication, an isochronous signal is a signal in which the time interval separating any two significant instants is equal to the unit interval or a multiple of the unit interval.
		Note 1: Variations in the time intervals are constrained within specified limits.
		Note 2: "Isochronous" is a characteristic, while "synchronous" indicates a relationship.
	en.wikipedia.org /wiki/Isochronous_signal (88 words)

	Fundamentals of Firewire
		The physical layer of the 1394 protocol includes the electrical signaling, the mechanical connectors and cabling, the arbitration mechanisms, and the serial coding and decoding of the data being transferred or received.
		Because there are no more isochronous devices left waiting to transmit, the idle time extends longer than the isochronous gap until it reaches the duration defined as the subaction (or asynchronous) gap.
		Isochronous channel allocation is performed by a node that wishes to transmit isochronous packets.
	www.embedded.com /1999/9906/9906feat2.htm (5052 words)

	[No title]
		on 09.02.02 discrete signal, discretely-timed signal: We propose to replace this entry by two entries expressing the fact that either the value of the signal is discrete (quantized) or the occurence (or validity) of a signal is restricted to certain intervals in time.
		In any case the use of the term "signal element" should be avoided in the definition of this term, because this is not the essential fact, but the simultaneity.
		721-03-27 baud (symb.: Bd) The unit of modulation rate or the unit of transfer rate of signal elements of constant duration in a discrete- ly-timed or digital signal; the number of bauds is equal to the reciprocal of the duration in seconds of the shortest signal element or of the unit interval in such signal.
	www.fh-frankfurt.de /~jacobson/WG7/rv09com1.txt (10478 words)

	Technical Reference
		The speed in bauds is the number of discrete conditions or signal elements per seconds.
		Bipolar - A signalling method (used in T1/E1) which represents a binary "1" by alternating positive and negative pulses, and a binary "0" by the absence of pulses.
		Burst isochronous - A burst isochronous signal consists of bursts of digits synchronized to a clock, interspersed by silent periods when no bits are presented.
	www.hullspeed.com /hstech.html (1551 words)

	Rane Professional Audio Reference (I)
		This recursive structure accepts as inputs digitized samples of the audio signal, and then each output point is computed on the basis of a weighted sum of past output (feedback) terms, as well as past input values.
		Both specify a two-sine wave test signal consisting of a large amplitude low-frequency tone linearly mixed with a high-frequency tone at ¼ the amplitude of the low frequency tone.
		The speculation was that when a rapidly-changing signal was fed to such an amplifier, a finite time was required for the correction signal to travel back through the feedback loop to the input stage and that the amplifier could be distorting seriously during this time.
	www.rane.com /par-i.html (3432 words)

	UNIX man pages : termiox (7I) (Site not responding. Last check: 2007-11-04)
		Isochronous hardware flow control occurs when one device controls the data transfer of another device by asserting or removing the transmit clock signals of that device.
		It is assumed that the connected device is using this clock signal to create its output.
		Output isochronous flow control is supported by appropriate clock source programming using the x_cflag field and enabled at the remote connected device.
	www.cs.duke.edu /cgi-bin/man2.cgi?termiox+7I (2043 words)

	Fire up that Wire! Get to know Apple's FireWire
		The maximum amount of bandwidth an isochronous device can obtain is limited only by the number of other isochronous devices that have already obtained bandwidth.
		Since acknowledgment is performed in asynchronous transfers (with isochronous, the data is just pumped out there), it's possible to have an error-correcting protocol inserted at the acknowledgment step.
		The physical layer of the protocol includes the electrical signaling, the mechanical connectors and cabling, the arbitration mechanisms, and the serial coding and decoding of the data.
	techrepublic.com.com /5100-1035_11-1033490.html (1188 words)

	UNIX man pages : termiox (7)
		SunOS 5.9 Last change: 3 Jul 1990 1 Ioctl Requests termiox(7I) Clock Modes Isochronous communication is a variation of asynchronous communication whereby two communicating devices may provide transmit and/or receive clock signals to one another.
		Incom- ing clock signals can be taken from the baud rate generator on the local isochronous port controller, from CCITT V.24 circuit 114, Transmitter Signal Element Timing - DCE source (EIA-232-D pin 15), or from CCITT V.24 circuit 115, Receiver Signal Element Timing - DCE source (EIA-232-D pin 17).
		Outgoing clock signals can be sent on CCITT V.24 cir- cuit 113, Transmitter Signal Element Timing - DTE source (EIA-232-D pin 24), on CCITT V.24 circuit 128, Receiver Signal Element Timing - DTE source (no EIA-232-D pin), or not sent at all.
	www.lehman.cuny.edu /cgi-bin/man-cgi?termiox+7 (2054 words)

	Sony Semiconductor - Press Releases/iLINK IEEE1394 LSI Link
		It can also simultaneously transmit multiple isochronous signals and support functions that allow electronic programming guides and other applications to provide users with interactive network services.
		It allows for the simultaneous transfer of two separate isochronous signals over a single connection.
		For example, the LSI can transmit one isochronous signal while receiving another, or it can simultaneously transmit two separate isochronous signals.
	products.sel.sony.com /semi/nriLINK.html (611 words)

	Product Folder : TAS1020A - Stereo USB Audio Interface
		Applications include digital speakers, which require the streaming of digital audio data between the host PC and the speaker system via the USB connection.
		DMA channels are provided to handle isochronous endpoint transactions.
		A direct memory access (DMA) controller with two channels is provided for streaming the USB isochronous data packets to/from the codec port interface.
	focus.ti.com /docs/prod/folders/print/tas1020a.html (873 words)

	comp.dcom.cell-relay FAQ: ATM and related technologies (part 3/8)
		(Contrast with Plesiochronous signals.) Typically for synchronous data interfaces there will be a separate clock signal and the data need not be clocked at a uniform rate.
		(Contrast with Plesiochronous signals.) * Isochronous: Signals which are dependant on some uniform timing or carry their own timing information embedded as part of the signal.
		So isochronous data signals can be thought of as being "self-clocked".
	www.faqs.org /faqs/cell-relay-faq/part3 (3523 words)

	Isochronous Transmission (Site not responding. Last check: 2007-11-04)
		Isochronous transmission uses a device common to the entire network to supply a clocking signal shared by all other devices.
		The clocking device allocates timing slots which are filled with data by transmitting devices who monitor the network for an open slot.
		A time slot can be filled with multiple frames.
	campus.champlain.edu /faculty/rogate/osi/datalink/isoch.htm (51 words)

	Press Release - JOINT PRODUCT DEVELOPMENT FOR COMPUTER TELEPHONY INTEGRATION
		The adapter card and the isoEthernet connection fabric will be integrated with other resources by SCSA Telephony Application Object (TAO) framework service software from Dialogic.
		IsoEthernet adds 96 isochronous ISDN B channels to the standard 10Base-T Ethernet channel and has been standardized by the IEEE 802.9a committee.
		Real-time computer telephony integration can only happen at the network enterprise desktop through an end-to-end isochronous network." said J. Michael Sodergren, strategic marketing director of National's Interactive Multimedia Group.
	www.national.com /news/1995/9503/n95004enet.html (626 words)

	InfoSatellite.com - VIA launches new chip in IEEE 1394 line
		Combined with a link layer in consumer electronics devices such as digital video recorders and cameras, the VIA VT6302 was said to be ideal for bandwidth-hungry multimedia applications.
		The VT6302 can also be combined with an IDE bridge for fast storage access for external storage disk drives, allowing rapid data transfer with the high volume isochronous signal.
		It also offers full 1394 functionality in PC systems when combined with a South Bridge with integrated link layer.
	www.infosatellite.com /news/2001/12/a031201via_vt6302.html (392 words)

	VIA Announces 2-Port PHY Chip Supporting IEEE 1394a
		Combined with a link layer in consumer electronics devices such as digital video recorders and cameras, the VIA VT6302 is ideal for bandwidth-hungry multimedia applications.
		The VIA VT6302 can also be combined with an IDE bridge for fast storage access for external storage disk drives, allowing rapid data transfer with the high volume isochronous signal.
		The VIA VT6302 also offers full 1394 functionality in PC systems when combined with a South Bridge with integrated link layer.
	www.pchardware.ro /press/preview.php?id=62 (466 words)

	List of electronics topics (Site not responding. Last check: 2007-11-04)
		Jam signal - Jamming - Jansky - Jitter
		K-factor - Karnaugh map - Kendall effect - Key pulsing - Kirchhoff's circuit laws - Klystron - Knife-edge effect
		Q code - Q-switching - QRP operation - Quadrature - Quadrature amplitude modulation - Quality assurance - Quality control - Quantum harmonic oscillator - Quartz clock - Quasi-analog signal - Queuing delay
	www.worldhistory.com /wiki/L/List-of-electronics-topics.htm (232 words)

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	www.ecost.com /ecost/shop/detail.asp?dpno=457282 (467 words)

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