公开(公告)号：US5387927A

公开(公告)日：1995-02-07

申请号：US122298

申请日：1993-09-17

Applicant: Christopher M. Look ,  Joe Geofroy ,  Piyush B. Kothary

Inventor： Christopher M. Look ,  Joe Geofroy ,  Piyush B. Kothary

IPC: H04H20/33 ,  H04H20/69 ,  H04J14/02 ,  H04L12/56 ,  H04N7/22 ,  H04Q11/04 ,  H04M11/00

CPC classification number: H04H20/69 ,  H04H20/33 ,  H04J14/0298 ,  H04N7/22 ,  H04Q11/0478 ,  H04J2203/0089 ,  H04L2012/5605 ,  H04L2012/561 ,  H04L2012/5616 ,  H04L2012/5672

Abstract: A method of transmitting broadband video services from a broadband digital signal source which includes forming the digital signal from said source into a plurality of channels of digital signals and modulating a plurality of carrier signals with respective channels of the digital signals. The resultant modulated channels are multiplexed to form a combined signal which is then used to modulate light from a laser light source. The modulated light signal is transmitted along a light fibre to a local distribution box where it is converted to electrical signals and broadcast to a number of subscriber set top terminals, Each set top terminal detects the modulated signal of a channel pre-assigned to that set top terminal. User control information is also received by that set top terminal and transmitted to the central office.

Abstract translation: 一种从宽带数字信号源发送宽带视频服务的方法，包括从所述源形成数字信号到多个数字信号通道，并用数字信号的相应通道调制多个载波信号。 所得到的调制信道被复用以形成组合信号，然后将其用于调制来自激光光源的光。 调制光信号沿着光纤传输到本地分配盒，在那里它被转换成电信号并广播到多个用户机顶端。每个机顶终端检测预分配给该组的信道的调制信号 顶级终端。 用户控制信息也由该机顶终端接收并发送到中心局。

公开(公告)号：US5768279A

公开(公告)日：1998-06-16

申请号：US186677

申请日：1994-01-25

Applicant: Belwinder S. Barn ,  Joe Geofroy ,  Piyush Bhupatrai Kothary ,  Christopher Michael Look

Inventor： Belwinder S. Barn ,  Joe Geofroy ,  Piyush Bhupatrai Kothary ,  Christopher Michael Look

IPC: H04B3/38 ,  H04H60/94 ,  H04M7/00 ,  H04M11/00 ,  H04H1/08

CPC classification number: H04M11/00 ,  H04B3/38 ,  H04H60/94 ,  H04M7/006 ,  H04B2203/542 ,  H04B2203/5466 ,  H04H2201/70

Abstract: A broad band broadcasting transmission system for sending broad band downstream data and telephone signals from a central office to a number subscriber set top terminal. Each frame of data is marked to indicate the set top terminals it is to be received by. A downstream light fiber is located between the head office and a curbside box. A transmitter transmits the frames along a light fiber to a SAC box. A converter converts the light signals from the light fiber to electrical signals. A distribution line coupled to the curbside box carries the electrical signals to a plurality of drop line twisted pair conductors connected to the distribution line. The drop lines are coupled via a residential units to the set top terminals. The downstream data is transmitted in a single broad frequency band in a frequency range starting sufficiently greater than zero so that distinct frequency bands are available between zero and the starting frequency for the transmission of ordinary telephone service and upstream signals from the set top terminals to the central office.

Abstract translation: 一种宽带广播传输系统，用于将宽带下行数据和电话信号从中心局发送到号码用户机顶端。 数据的每一帧被标记为指示要由其接收的机顶终端。 下游光纤位于总公司和路边箱之间。 发射机沿着光纤将帧发送到SAC盒。 A转换器将来自光纤的光信号转换为电信号。 耦合到路边箱的配电线路将电信号传送到连接到配电线路的多个下降线双绞线导线。 下降线路通过住宅单元耦合到机顶终端。 下游数据在一个宽的频带内以一个足够大的零开始的频率范围内传输，这样在0和起始频率之间可以有不同的频带可用于普通电话业务的传输和从机顶终端到上位机的上行信号 中央办公室。