Full duplex modem system for differing data bit rates
First Claim
1. In a communication system:
- a pair of full duplex modems connected by a channel,each modem being designed to transmit to the other at the same predetermined baud rate,one of said modems being designed to receive a first series of data bits at a predetermined first rate for transmission over said channel and to transmit said received bits as first transmission bits over said channel as an integral number of first transmission bits per baud,the other of said modems being designed to receive a second series of data bits at a data bit rate slower than the predetermined baud rate, for transmission over said channel,means forming part of said other modem for sequentially encoding blocks of said second series of data bits in blocks into a larger number of second transmission bits for transmission over said channel at an integral number of second transmission bits per baudmeans forming part of said one modem for decoding said second transmission bits into said second series of data bits.
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Accused Products
Abstract
A pair of full duplex modems are connected and each is designed to transmit to the other at the same predetermined band rates. One modem is connected to receive data bits for transmission over the channel at a predetermined first (and fast) rate and to transmit its received data bits at a integral number of first transmission bits per band. The other modem is connected to receive data bits for transmission over the channel at a rate slower than the band rate and is designed to sequentially encode blocks of said slower rate data bits into a larger number of second transmission bits for transmission over said channel at an integral number of second transmission bits per band. Means forming part of said one modem for converting said second transmission bits into the slower rate data bits.
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Citations
18 Claims
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1. In a communication system:
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a pair of full duplex modems connected by a channel, each modem being designed to transmit to the other at the same predetermined baud rate, one of said modems being designed to receive a first series of data bits at a predetermined first rate for transmission over said channel and to transmit said received bits as first transmission bits over said channel as an integral number of first transmission bits per baud, the other of said modems being designed to receive a second series of data bits at a data bit rate slower than the predetermined baud rate, for transmission over said channel, means forming part of said other modem for sequentially encoding blocks of said second series of data bits in blocks into a larger number of second transmission bits for transmission over said channel at an integral number of second transmission bits per baud means forming part of said one modem for decoding said second transmission bits into said second series of data bits. - View Dependent Claims (3, 5, 7, 8, 15, 16, 17, 18)
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2. A full duplex modem
being connected to a channel to receive and transmit thereon at the same predetermined baud rate, means in said modem for receiving data bits for transmission over said channel, at a predetermined data bit rate less than said predetermined baud rate and for converting said data bits in blocks into a larger number of transmission bits, to provide an integral number of transmission bits per baud for transmission along said channel.
- 9. A full duplex modem designed for reception and transmission over a channel at a predetermined baud rate, designed to receive from said channel first transmission bits at a rate which is an integral number of bits per baud, and having means designed to be supplied with data bits at a rate which is a fractional number of bits per baud, means for converting said bits in blocks into a larger number of second transmission bits with values having a unique relationship to a block of said bits at an integral number per baud and means for transmitting said second bits on said channel.
Specification