Moving picture camera with universal serial bus interface
First Claim
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1. A video conferencing system comprising:
- a first housing,a bus located inside said first housing,a processor located inside said first housing and connected to said bus,a first interface circuit located inside said first housing and connected to said bus, said first interface circuit comprising a first hub and a serial port for receiving digital signals, that are transmitted according to a predefined communications protocol, originating outside said first housing,a communications medium located outside said first housing and connected to said first interface circuit externally to said first housing, for communicating a serial bitstream,a second housing external to said first housing,an imaging device located inside said second housing that converts moving pictures to a video signal,a bit-rate reduction circuit inside said second housing and connected to said imaging device which reduces a bit rate of said video signal to a selected one of a plurality of multiple bit rates, so as to produce a bit-rate reduced video signal having a lower bandwidth than said video signal prior to bit rate reduction, such that the selected bit-rate reduced video signal being adaptable to and transferable over one of a plurality of different types of networks, each different type of network having different bit rates and different communications protocols from one another, anda second interface circuit located inside said second housing and having a second hub connected between said bit rate reduction circuit and said communications mediun, for receiving said bit rate reduced video signal and outputting said bit rate reduced video signal as a serial bitstream on said communications medium in accordance with said predefined communications protocolwherein said processor transfers at least one instruction packet via said bus, said first hub, said communication medium and said second hub to said bit rate reduction circuit containing an instruction indicating bit rate information of a selected one of said plurality of different networks, from one of a plurality of predetermined adjustable bit rates representing said plurality of different types of networks, independent of any bit rate information feedback from the selected network.
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Abstract
A camera is provided that can be connected to a processing system via an external connector outside of the housing of the processing system. The camera includes a camera housing. An imaging device is provided inside the camera housing that converts moving pictures to a video signal. A bit rate reduction circuit is also provided inside the camera housing and connected to the imaging device. The bit-rate reduction circuit reduces a bit rate of the moving picture signal so as to produce a bit-rate reduced video signal having a lower bandwidth than the video signal prior to bit rate reduction.
218 Citations
12 Claims
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1. A video conferencing system comprising:
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a first housing, a bus located inside said first housing, a processor located inside said first housing and connected to said bus, a first interface circuit located inside said first housing and connected to said bus, said first interface circuit comprising a first hub and a serial port for receiving digital signals, that are transmitted according to a predefined communications protocol, originating outside said first housing, a communications medium located outside said first housing and connected to said first interface circuit externally to said first housing, for communicating a serial bitstream, a second housing external to said first housing, an imaging device located inside said second housing that converts moving pictures to a video signal, a bit-rate reduction circuit inside said second housing and connected to said imaging device which reduces a bit rate of said video signal to a selected one of a plurality of multiple bit rates, so as to produce a bit-rate reduced video signal having a lower bandwidth than said video signal prior to bit rate reduction, such that the selected bit-rate reduced video signal being adaptable to and transferable over one of a plurality of different types of networks, each different type of network having different bit rates and different communications protocols from one another, and a second interface circuit located inside said second housing and having a second hub connected between said bit rate reduction circuit and said communications mediun, for receiving said bit rate reduced video signal and outputting said bit rate reduced video signal as a serial bitstream on said communications medium in accordance with said predefined communications protocol wherein said processor transfers at least one instruction packet via said bus, said first hub, said communication medium and said second hub to said bit rate reduction circuit containing an instruction indicating bit rate information of a selected one of said plurality of different networks, from one of a plurality of predetermined adjustable bit rates representing said plurality of different types of networks, independent of any bit rate information feedback from the selected network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A video conferencing and processing terminal comprising:
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(a) a computer housing containing; (a1) an internal bus, (a2) a general purpose processor connected to said internal bus, instruction, data and video information being transferable to and from said processor via said bus, said processor for time shared performance of data processing and processing associated with conducting a video conference, (a3) a bridge connected to said internal bus, instruction, data, and video information being transferable to and from said bridge via said internal bus, said bridge comprising a hub, data, instruction and video information being transferable to and from said hub of said bridge in a bidirectional serial bitstream according to a first predefined communications protocol on a first external communications network, (a4) at least one external communications interface for bidirectionally transferring at least video information and instructions between said general purpose processor and a second communications network external to said computer housing, said second communications network being of a different type, utilizing a different communications protocol, as said first external communications network, (b) a communication medium of said first external communications network connected to said hub and located external to said computer housing, (c) a camera housing external to said computer housing containing; (c1) an imaging device for converting moving picture images to a video signal, (c2) a programmable bit rate reduction circuit connected to said imaging device for reducing a bit rate of said video signal, said programmable bit rate reduction circuit for responding to one or more instructions originating externally to said camera housing by varying said reduction of bit rate of said video signal, and (c3) a second hub connected between said bit rate reduction circuit and said communications medium, for bidirectional transfer of serial bitstreams across said communication medium, and for multiplexing said bit rate reduced video signal and instruction packets into said serial bitstreams so as to transfer said bit rate reduced video signal from said bit rate reduction circuit to said first hub and to bidirectionally transfer instruction packets between said bit rate reduction circuit and said first hub, said second hub also for demultiplexing from said bitstreams transferred on said communication medium only packets destined to circuitry within said camera housing and refraining from demultiplexing each other packet destined to circuitry external to said camera housing communicated in said bitstreams, wherein said first hub, said second hub and said communication medium define at least part of said first external communication network, at least one of said first and second hubs comprising an additional connector for connecting a second communication medium and a third hub to form a tree topology communication network with said first hub serving as said root hub, said first and second hub responding to instructions according to said first communication protocol for adjusting a generation of, and multiplexing of data onto, bidirectionally transmitted serial bitstreams on each communication medium connected thereto to enable data transfers to originate from, or terminate at, said camera housing, said computer housing, and at least one other device connected to said first external communication network via said third hub, wherein said processor transfers at least one instruction packet via said internal bus, said first hub, said communication medium and said second hub to said bit rate reduction circuit containing an instruction for adjusting a bit rate of said bit rate reduced video signal, according to a capacity of said first external communication network for carrying said bit rate reduced video signal, as well as information from at least one other device located outside said camera housing and said computer housing but connected to said first external communications network via said third hub, and at least one of (1) a capacity of said second external communications networks for carrying said bit rate reduced video signal, (2) a restoration processing capability of another video conferencing terminal, with which said video conferencing and data processing terminal communicates via said second external communications network, and (3) a display resolution of said second video conferencing terminal. - View Dependent Claims (12)
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Specification