Digital data transmission device and method, digital data demodulation device and method, and transmission medium
First Claim
Patent Images
1. A digital data transmission device for HA coding a plurality of packets, each packet having a main signal and a packet synchronizing signal, (ii) arranging the packets to constitute a frame, and (iii) replacing each packet synchronizing signal with a frame synchronizing signal and a transmission control signal of the main signal, the device comprising:
- means for generating the frame synchronizing signal of the frame;
means for supplying the main signal to be transmitted in the frame;
means for generating the transmission control signal; and
means for convolutional-coding the frame synchronizing signal, the transmission control signal, and the main signal.
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Abstract
Frame synchronizing signals held by a synchronization register are Reed-Solomon-coded by a Reed-Solomon coding circuit, then interleaved by an interleave circuit, then convolutional-coded by a convolutional coding circuit, then mapped by a mapping circuit, and then outputted. Thus, the frame synchronizing signals can be stably and quickly detected.
126 Citations
43 Claims
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1. A digital data transmission device for HA coding a plurality of packets, each packet having a main signal and a packet synchronizing signal, (ii) arranging the packets to constitute a frame, and (iii) replacing each packet synchronizing signal with a frame synchronizing signal and a transmission control signal of the main signal, the device comprising:
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means for generating the frame synchronizing signal of the frame; means for supplying the main signal to be transmitted in the frame; means for generating the transmission control signal; and means for convolutional-coding the frame synchronizing signal, the transmission control signal, and the main signal. - View Dependent Claims (2)
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3. A digital data transmission method for coding a frame formed from a plurality of packets, each packet having a main signal and a packet synchronizing signal, the method comprising:
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generating a frame synchronizing signal of the frame; supplying the main signal to be transmitted in the frame; replacing each packet synchronizing signal with a frame synchronizing signal and a transmission control signal of the main signal; and convolutional-coding the frame synchronizing signal, the transmission control signal, and the main signal.
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4. A transmission medium for transmitting a program for coding a frame formed from a plurality of packets, each packet having a main signal and a packet synchronizing signal, the program comprising the steps of:
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generating a frame synchronizing signal of the frame; supplying a main signal to be transmitted in the frame; replacing the packet synchronizing signal with a frame synchronizing signal and a transmission control signal of the main signal; and convolutional-coding the frame synchronizing signal, the transmission control signal, and the main signal.
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5. A digital data demodulation device for demodulating transmitted signals, the device comprising:
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decoding means for receiving the transmitted signals. the transmitted signals being formed by (i) coding a plurality of packets, each packet having a main signal and a packet synchronizing signal, (ii) arranging the packets to constitute a frame, (iii) replacing each packet synchronizing signal with a frame synchronizing signal, and (iv) convolutional-coding the main signal and the frame synchronizing signal, the decoding means being operable for convolutional-decoding the main signal and the frame synchronizing signal; and synchronization detection means for detecting the frame synchronizing signal from the transmitted signals before convolutional decoding by the decoding means. - View Dependent Claims (6, 7, 8)
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9. A digital data demodulation method for demodulating transmitted signals, the method comprising:
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receiving the transmitted signals, the transmitted signals being formed by (i) coding a plurality of packets, each packet having a main signal and a packet synchronizing signal, (ii) arranging the packets to constitute a frame, (iii) replacing each packet synchronizing signal with a frame synchronizing signal, and (iv) convolutional-coding the main signal and the frame synchronizing signal; convolutional-decoding the main signal and the frame synchronizing signal; and detecting the frame synchronizing signal from the transmitted signals before convolutional decoding at the decoding step.
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10. A transmission medium for transmitting a program for demodulating transmitted signals, the program comprising the steps of:
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receiving the transmitted signals, the transmitted signals being formed by (i) coding a plurality of packets, each packet having a main signal and a packet synchronizing signal, (ii) arranging the packets to constitute a frame, (iii) replacing each packet synchronizing signal with a frame synchronizing signal, and (iv) convolutional-coding the main signal and the frame synchronizing signal; convolutional-decoding the main signal and the frame synchronizing signal which are transmitted; and detecting the frame synchronizing signal from the transmitted signals before convolutional decoding at the decoding step.
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11. A digital data transmission device for coding a plurality of packets including a main signal, arranging the packets to constitute a frame, replacing a synchronizing signal of the packets by a transmission control signal of the main signal, and transmitting the signals, the device comprising:
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supply means for supplying the main signal; transmission control signal generation means for generating the transmission control signal; specified pattern signal generation means for generating a specified pattern of signal; multiplexing means for multiplexing the specified pattern of signal to the forward side and the back side of the transmission control signal; convolutional coding means for convolutional-coding the main signal, the transmission control signal, and the specified pattern of signal; first modulation means for modulating the main signal by a first system; and second modulation means for modulating the transmission control signal and the specified pattern of signal by a second system. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A digital data transmission method for coding a plurality of packets including a main signal, arranging the packets to constitute a frame, replacing a synchronizing signal of the packets by a transmission control signal of the main signal, and transmitting the signals, the method comprising:
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supplying the main signal; generating the transmission control signal; generating a specified pattern of signal; multiplexing the specified pattern of signal to the forward side and the back side of the transmission control signal; convolutional-coding the main signal, the transmission control signal, and the specified pattern of signal; modulating the main signal by a first system; and modulating the transmission control signal and the specified pattern of signal by a second system.
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25. A transmission medium for transmitting a program used for a digital data transmission device for coding a plurality of packets including a main signal, arranging the packets to constitute a frame, replacing a synchronizing signal of the packets by a transmission control signal of the main signal, and transmitting the signals, the program comprising the steps of:
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supplying the main signal; generating the transmission control signal;
generating a specified pattern of signal;multiplexing the specified pattern of signal to the forward side and the back side of the transmission control signal; convolutional-coding the main signal, the transmission control signal, and the specified pattern of signal; modulating the main signal by a first system; and modulating the transmission control signal and the specified pattern of signal by a second system.
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26. A digital data demodulation device for demodulating transmitted data formed by coding a plurality of packets including a main signal, arranging the packets to constitute a frame, replacing a synchronizing signal of the packets by a transmission control signal of the main signal, and convolutional-coding the signals, the device comprising:
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demodulation means for demodulating the main signal transmitted thereto by a first system and demodulating the transmission control signal and a specified pattern of signal which are transmitted thereto by a second system; and decoding means for Viterbi-decoding the main signal, the transmission control signal and the specified pattern of signal which are demodulated. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A digital data demodulation method for demodulating transmitted data formed by coding a plurality of packets including a main signal, arranging the packets to constitute a frame, replacing a synchronizing signal of the packets by a transmission control signal of the main signal, and convolutional-coding the signals, the method comprising:
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demodulating the transmitted main signal by a first system and demodulating the transmission control signal and a specified pattern of signal which are transmitted by a second system; and Viterbi-decoding the main signal, the transmission control signal and the specified pattern of signal which are demodulated.
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38. A transmission medium for transmitting a program used for a digital data demodulation device for demodulating transmitted data formed by coding a plurality of packets including a main signal, arranging the packets to constitute a frame, replacing a synchronizing signal of the packets by a transmission control signal of the main signal, and convolutional-coding the signals, the program comprising the steps of:
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demodulating the transmitted main signal by a first system and demodulating the transmission control signal and a specified pattern of signal which are transmitted by a second system; and Viterbi-decoding the main signal, the transmission control signal and the specified pattern of signal which are demodulated.
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39. A data transmission device for coding frames of data from a plurality of packets, each packet including packet synchronizing data and main signal data, the data transmission device comprising:
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a first memory operable to store frame synchronizing data for each frame of data; a second memory operable to store transmission control data relating to transmission parameters of the main signal data; a multiplexing circuit operable to (i) receive the frame synchronizing data, transmission control data, and main signal data, and (ii) produce the frames of data wherein the packet synchronizing data is replaced by at least one of the frame synchronizing data and transmission control data; and a convolution coding circuit operable to receive the frames of data and produce a convolutional coded signal from;
(i) at lease one of the frame synchronizing data and the transmission control data; and
(ii) the main signal data.
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40. A data transmission device for coding frames of data from a plurality of packets, each packet including packet synchronizing data and a main signal data, the data transmission device comprising:
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a first memory operable to store frame synchronizing data for each frame of data; a second memory operable to store transmission control data relating to transmission parameters of the main signal data; a multiplexing circuit operable to (i) receive the frame synchronizing data, transmission control data, and main signal data, and (ii) produce the frames of data such that a signal pattern is produced from the frame synchronizing data and the transmission control data; and a convolution coding circuit operable to receive the frames of data and produce a convolutional coded signal from the signal pattern and the main signal data. - View Dependent Claims (41, 42)
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43. A data demodulation device for demodulating coded frames of data which are transmitted over a communications channel,
the coded frames of data being formed from: - (i) a plurality of packets, each packet including packet synchronizing data and main signal data, and (ii) frame synchronizing data for each frame of data,
the frames of data being formed by multiplexing the frame synchronizing data and main signal data such that the packet synchronizing data is replaced by the frame synchronizing data, and the coded frames of data being formed by convolution coding the frames of data, the data demodulation device comprising; a synchronization detection circuit operable to detect the frame synchronizing data from the transmitted coded frames of data; and a decoding circuit operable to perform convolutional-decoding of the main signal data and the frame synchronizing data of the coded frame data after the frame synchronization data is detected.
- (i) a plurality of packets, each packet including packet synchronizing data and main signal data, and (ii) frame synchronizing data for each frame of data,
Specification