Digital transmission system, transmitter and receiver for use in the transmission system
DC CAFCFirst Claim
1. A digital transmission system comprising a transmitter and a receiver, for transmitting wide-band digital information having a sample frequency F, via a transmission medium, and for receiving said information,said transmitter having an input terminal for receiving said information to be transmitted, in the form of a first digital signal;
- an output; and
a signal source, having an input coupled to said input terminal, for generating and supplying to said output a second digital signal which includes said information, said second digital signal comprising consecutive frames, each frame comprising a plurality of information packets, and each information packet comprising N bits, where N>
1,said receiver comprising a decoder and an output terminal, said decoder having an input for receiving said second digital signal and an output coupled to said output terminal for supplying said wide-band digital information,characterized in that, in the formula ##EQU4## where BR is the bit rate of said second digital signal, and ns is the number of samples of said information whose corresponding information in said second signal is included in one frame of said second signal,if P is an integer, the number of information packets in one frame is P, andif P is not an integer, the number of information packets in a number v of the frames is P'"'"', where P'"'"' is the highest integer whose value is less than P; and
the number of information packets in a number w of the other frames is p'"'"'+1, the numbers v and w being selected such that the average frame rate of said second digital signal is substantially equal to Fs /ns, and that each frame comprises at least a first frame portion including synchronizing information.
2 Assignments
Litigations
1 Petition
Reexamination
Accused Products
Abstract
Digital data are transmitted as packets within frames, at an average frame rate equal to the sampling rate divided by the number of samples per frame. When, as a result of subband or other coding, the number of packets required per frame would not be an integer, frames containing the next lower integer are transmitted, followed by frames containing the next higher integer. Preferably a first portion of each frame contains synchronization information, a second portion contains allocation information, and a third contains samples of, and scale factor information for, the transmitted signal.
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Citations
33 Claims
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1. A digital transmission system comprising a transmitter and a receiver, for transmitting wide-band digital information having a sample frequency F, via a transmission medium, and for receiving said information,
said transmitter having an input terminal for receiving said information to be transmitted, in the form of a first digital signal; - an output; and
a signal source, having an input coupled to said input terminal, for generating and supplying to said output a second digital signal which includes said information, said second digital signal comprising consecutive frames, each frame comprising a plurality of information packets, and each information packet comprising N bits, where N>
1,said receiver comprising a decoder and an output terminal, said decoder having an input for receiving said second digital signal and an output coupled to said output terminal for supplying said wide-band digital information, characterized in that, in the formula ##EQU4## where BR is the bit rate of said second digital signal, and ns is the number of samples of said information whose corresponding information in said second signal is included in one frame of said second signal, if P is an integer, the number of information packets in one frame is P, and if P is not an integer, the number of information packets in a number v of the frames is P'"'"', where P'"'"' is the highest integer whose value is less than P; and
the number of information packets in a number w of the other frames is p'"'"'+1, the numbers v and w being selected such that the average frame rate of said second digital signal is substantially equal to Fs /ns, and that each frame comprises at least a first frame portion including synchronizing information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 28, 29)
- an output; and
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24. A transmitter for transmitting wide-band digital information having a sample frequency F, via a transmission medium, comprising:
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an input terminal for receiving said information to be transmitted, in the form of a first digital signal, an output, and a signal source, having an input coupled to said input terminal, for generating and supplying to said output a second digital signal which includes said information, said second digital signal comprising consecutive frames, each frame comprising a plurality of information packets, and each information packet comprising N bits, where N>
1,characterized in that, in the formula ##EQU5## where BR is the bit rate of said second digital signal, and ns is the number of samples of said information whose corresponding information in said second signal is included in one frame of said second signal, if P is an integer, the number of information packets in one frame is P, and if P is not an integer, the number of information packets in a number v of the frames is P'"'"', where P'"'"' is the highest integer whose value is less than P; and
the number of information packets in a number w of the other frames is p'"'"'+1, the numbers v and w being selected such that the average frame rate of said second digital signal is substantially equal to Fs /ns, and that each frame comprises at least a first frame portion including synchronizing information. - View Dependent Claims (25, 30, 31)
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26. A receiver for receiving wide-band digital information having a sample frequency Fs transmitted over a transmission medium, having an output at which said information is provided in the form of a first digital signal, and a decoder for receiving said information in the form of an encoded second digital signal which comprises consecutive frames, each frame comprising a plurality of information packets, and each information packet comprising N bits, where N>
- 1,
characterized in that, in the formula ##EQU6## where BR is the bit rate of said second digital signal, and ns is the number of samples of said information whose corresponding information in said second signal is included in one frame of said second signal, if P is an integer, the number of information packets in one frame is P, and if P is not an integer, the number of information packets in a number v of the frames is P'"'"', where P'"'"' is the highest integer whose value is less than P; and
the number of information packets in a number w of the other frames is p'"'"'+1, the numbers v and w being selected such that the average frame rate of said second digital signal is substantially equal to Fs /ns, and that each frame comprises at least a first frame portion including synchronizing information. - View Dependent Claims (27, 32, 33)
- 1,
Specification