-
公开(公告)号：US3909791A
公开(公告)日：1975-09-30
申请号：US48192874
申请日：1974-06-21
Applicant: IBM
Inventor： VAN DEN BERG JAN WOUTER
CPC classification number: H04L25/0262 , G06F13/12 , G06F13/22
Abstract: This description is of a complete small telecommunications processor which can be set to process lines of different speed characteristics. Each of the lines is scanned in turn, and each scan is counted for each line. The line sampling can be at any selected bit rate and can be the same for some lines or can be different for each line. The frequency divider comprises a storage having a two part storage for each line, a decrementer, a register, and a feedback path back to the storage. During operation, a divisor is stored in a buffer part of storage. If the counter part of the same storage area is at zero, the buffer value is transferred through the decrementer and the register back into the counter storage. At each scan cycle thereafter, the count value is cycled and decremented until it reaches zero. This causes a pulse signal to be sent out and a reloading of the counter part with the value stored in the buffer. Continual repetition of such decrementing and reloading cycles will generate an output series of signals having a preselected frequency ratio with the input scanning frequency. If more than one line is being controlled by the frequency divider, the output signals will be interspersed in individual time slots of the output line.
Abstract translation: 该描述是一个完整的小型电信处理器，可以设置为处理不同速度特性的线路。 每行都依次进行扫描，每行扫描每行。 线采样可以是任何选择的比特率，并且对于一些线可以是相同的，或者对于每条线可以是不同的。 该分频器包括一个具有每一行的两部分存储器的存储器，一个减法器，一个寄存器和一个返回存储器的反馈路径。
-
公开(公告)号：DE68922444D1
公开(公告)日：1995-06-08
申请号：DE68922444
申请日：1989-07-14
Applicant: IBM
Inventor： DAVIS GORDON TAYLOR , HO LUNG MICHAEL GEORGE , MANDALIA BAIJU DHIRAJLAL , MILLAS ROLAN JOSE , ORTEGA OSCAR EMILIO , PICON RAFAEL JOSE , QUEEN LORAN RAY , ROBINSON RICHARD HOUSTON , ROBINSON WILLIAM ROBERT , SHARP LEO ALVIN , VAN DEN BERG JAN WOUTER
Abstract: A dual digital signal processor (DSP) provides real time links between multiple time division channels of a digital carrier system (e.g. T-1) and a host data processor. Operating only on digital signals, internally and at its interfaces to the carrier and host systems, the DSP exchanges data and control signalling information with the carrier system and data and control information with the host processor, converting the data in passage to different digital forms. At the interface to the carrier system, signals are received and transmitted in a form adapted to diverse terminal equipment of users remotely linked to the carrier system via the switched public network. At the host interface, signals are transferred and received in a form suited to the data process requirements of the host system (e.g. data bytes directly representing alphanumeric characters). Thus, the DSP acts as the equivalent of multiple different types of modems in performing required conversions. The DSP may also perform processing services in order to reduce the processing burden on the host system (e.g. parity checking of data, detection of specific character functions in data or specific tones in audio signals, selective routing of voice to host storage for voice mail applications, etc.)
-
公开(公告)号：DE68922444T2
公开(公告)日：1996-02-15
申请号：DE68922444
申请日：1989-07-14
Applicant: IBM
Inventor： DAVIS GORDON TAYLOR , HO LUNG MICHAEL GEORGE , MANDALIA BAIJU DHIRAJLAL , MILLAS ROLAN JOSE , ORTEGA OSCAR EMILIO , PICON RAFAEL JOSE , QUEEN LORAN RAY , ROBINSON RICHARD HOUSTON , ROBINSON WILLIAM ROBERT , SHARP LEO ALVIN , VAN DEN BERG JAN WOUTER
Abstract: A dual digital signal processor (DSP) provides real time links between multiple time division channels of a digital carrier system (e.g. T-1) and a host data processor. Operating only on digital signals, internally and at its interfaces to the carrier and host systems, the DSP exchanges data and control signalling information with the carrier system and data and control information with the host processor, converting the data in passage to different digital forms. At the interface to the carrier system, signals are received and transmitted in a form adapted to diverse terminal equipment of users remotely linked to the carrier system via the switched public network. At the host interface, signals are transferred and received in a form suited to the data process requirements of the host system (e.g. data bytes directly representing alphanumeric characters). Thus, the DSP acts as the equivalent of multiple different types of modems in performing required conversions. The DSP may also perform processing services in order to reduce the processing burden on the host system (e.g. parity checking of data, detection of specific character functions in data or specific tones in audio signals, selective routing of voice to host storage for voice mail applications, etc.)
-
公开(公告)号：DE2848642A1
公开(公告)日：1979-06-07
申请号：DE2848642
申请日：1978-11-09
Applicant: IBM
-
-
-
Search Results
4
records
(took 0.017 seconds)
