Method and apparatus for controlling transmission of multiplexed video signals
First Claim
1. In a transmission system for bi-directionally transmitting a plurality of signals between two transmission/reception units interconnected through transmission means, a transmission control method comprising the step of:
- when at least one of said plurality of signals is subjected to one of a transmission disabled condition, a transmission not required state, a reception disabled state and a reception not required state, stopping or setting into a stand-by condition at least one of a transmission operation or a reception operation for said at least one signal of said plurality of signals remaining in said one state.
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Accused Products
Abstract
In a transmission system for bi-directionally transmitting and receiving a plurality of signals between two units, interconnected through a predetermined transmission path, if one of the plurality of signals falls into any of a transmission disabled state, a transmission not required state, a reception disabled state, and a reception not required state, at least one of a transmission operation and a reception operation for the signal in the one state is stopped or set into a stand-by state, thereby reducing electric power consumed by the transmission system. In addition, a transmission bandwidth of the transmission path is reduced by a portion associated with the signal in the one state, or an entire bandwidth for all signals except for the signal in the one state is expanded without changing the transmission bandwidth of the transmission path.
44 Citations
22 Claims
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1. In a transmission system for bi-directionally transmitting a plurality of signals between two transmission/reception units interconnected through transmission means, a transmission control method comprising the step of:
when at least one of said plurality of signals is subjected to one of a transmission disabled condition, a transmission not required state, a reception disabled state and a reception not required state, stopping or setting into a stand-by condition at least one of a transmission operation or a reception operation for said at least one signal of said plurality of signals remaining in said one state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A transmission system for bi-directionally transmitting a first plurality of signals and a second plurality of signals through transmission means between a first transmission/reception unit and a second transmission/reception unit interconnected through said transmission means, wherein:
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said first transmission/reception unit comprises; first transmission means for transmitting said first plurality of signals to said transmission means; first determination means for determining states of said plurality of signals to be transmitted; first control means responsive to a determination result of said first determination means for stopping or setting into a stand-by state a transmission operation in said first transmission means for at least one signal within said first plurality of signals corresponding to said determination result; and first reception means for receiving said second plurality of signals transmitted from said second transmission/reception unit through said transmission means, and said second transmission/reception unit comprises; second reception means for receiving said first plurality of signals transmitted from said first transmission/reception unit through said transmission means; second determination means for determining states of said first plurality of signals received by said second reception means; second control means responsive to a determination result of said determination means for stopping or setting into a stand-by state a reception operation in said second reception means for at least one signal within said first plurality of signals; and second transmission means for transmitting said second plurality of signals to said transmission means, said first control means, responsive to a first determination result made by said first determination means that at least one signal of said first plurality of signals is in one of a transmission disabled state and a transmission not required state as said determination result, for stopping or setting into a stand-by state a transmission operation in said first transmission means for at least one signal of said first plurality of signals indicated by said first determination result, said second control means, responsive to a second determination result made by said second determination means that at least one signal of said first plurality of signals is in one of a reception disabled state and a reception not required state as said determination result, for stopping or setting into a stand-by state a reception operation in said second reception means for said at least one signal of said first plurality of signals indicated by said second determination result. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. In a transmission system for bi-directionally transmitting a first plurality of signals and a second plurality of signals, each of said first and second pluralities of signals comprising non-signal periods and signal periods, through transmission means between a first transmission/reception unit and a second transmission/reception unit interconnected through said transmission means, a method for use in said second transmission/reception unit for selectively outputting a third signal of said first plurality of signals transmitted from said first transmission/reception unit to said second transmission/reception unit through said transmission means and a fourth signal of said second plurality of signals transmitted from said second transmission/reception unit to said first transmission/ reception unit through said transmission means to an output terminal of said second transmission/reception unit, said method comprising the steps of:
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outputting said fourth signal during a non-signal period of said fourth signal to said output terminal instead of said third signal when switching a signal outputted to said output terminal from said third signal to said fourth signal; and starting a reception operation for said third signal and outputting said third signal to said output terminal during a non-signal period of said third signal instead of said fourth signal after said reception operation has been properly performed, when switching a signal outputted to said output means from said fourth signal to said third signal.
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22. A transmission system for bi-directionally transmitting a first plurality of signals and a second plurality of signals, each of said first and second pluralities of signals comprising non-signal periods and signal periods, through transmission means between a first transmission/reception unit and a second transmission/reception unit interconnected through said transmission means, wherein:
said second transmission/reception unit comprises; reception means for receiving said first plurality of signals transmitted from said first transmission/reception unit through said transmission means; transmission means for transmitting said second plurality of signals to said first transmission/reception unit through said transmission means; output means; selection means for selectively outputting a third signal of said first plurality of signals received by said reception means and a fourth signal of said second plurality of signals transmitted from said second transmission means to said output means; and selection control means for controlling said selection means, and said selection control means includes; means for outputting said fourth signal to said output means during a non-signal period of said fourth signal instead of said third signal when switching a signal outputted to said output means from said third signal to said fourth signal; and means for starting a reception operation for said third signal and outputting said third signal to said output means during a non-signal period of said third signal instead of said fourth signal after said reception operation has been properly performed when switching a signal outputted to said output means from said fourth signal to said third signal.
Specification