公开(公告)号：EP1484913A3

公开(公告)日：2009-04-15

申请号：EP04012918.1

申请日：2004-06-01

申请人： Broadcom Corporation

发明人： Gomez, Ramon A. ,  McMullin, Donald G.

IPC分类号： H04N5/40

CPC分类号： H04L63/04 ,  H03D7/161 ,  H04L63/062 ,  H04L63/08 ,  H04L63/123 ,  H04N7/10

摘要： Systems and methods for digital upconversion of baseband television signals that can be used in cable television headend systems are provided. In one embodiment, the system includes a digital frequency adjustment system (120) and a digital to analog conversion system (130). In a feature of the embodiment, the digital frequency adjustment system (120) consists of set of digital upconversion (210A) and upsample elements (205A) that shift upwards the frequency of baseband signals. In a further feature of the embodiment, a tree structure of sets of upsample and upconversion elements is used. In another embodiment, the system includes digital (515) and analog (510) frequency adjustment systems in which the frequencies of the input signals are partially upshifted within both the digital and analog domains. Methods for digital upconversion of television signals are also provided.

公开(公告)号：EP2073541A2

公开(公告)日：2009-06-24

申请号：EP08021679.9

申请日：2008-12-12

申请人： Broadcom Corporation

发明人： McMullin, Donald G. ,  Gomez, Ramon A.

IPC分类号： H04N7/10 ,  H04L12/28 ,  H04H40/27

CPC分类号： H04H40/27 ,  H04B1/10 ,  H04B15/00 ,  H04B2215/068 ,  H04H20/78 ,  H04N7/104

摘要： Systems and methods for performing a method for reducing interference from Multimedia over Coax Alliance (MoCA) signals in a cable television double conversion tuner are provided. The method may include receiving an indication of the channel in which MoCA signals are operating. When the channel in which the MoCA signals are operating is in the same frequency band as an intermediate frequency of the tuner, the method may require shifting an intermediate frequency of the tuner out of the frequency band occupied by the channel in which the MoCA signals are operating.

摘要翻译： 提供了一种用于执行减少有线电视双转换调谐器中多媒体同轴电缆（MoCA）信号干扰的方法的系统和方法。 该方法可以包括接收MoCA信号正在操作的信道的指示。 当MoCA信号操作的信道处于与调谐器的中频相同的频带中时，该方法可能需要将调谐器的中频从由MoCA信号所在的信道占据的频带中移出 操作。

公开(公告)号：EP1484913A2

公开(公告)日：2004-12-08

申请号：EP04012918.1

申请日：2004-06-01

申请人： Broadcom Corporation

发明人： Gomez, Ramon A. ,  McMullin, Donald G.

IPC分类号： H04N5/40

CPC分类号： H04L63/04 ,  H03D7/161 ,  H04L63/062 ,  H04L63/08 ,  H04L63/123 ,  H04N7/10

摘要： Systems and methods for digital upconversion of baseband television signals that can be used in cable television headend systems are provided. In one embodiment, the system includes a digital frequency adjustment system (120) and a digital to analog conversion system (130). In a feature of the embodiment, the digital frequency adjustment system (120) consists of set of digital upconversion (210A) and upsample elements (205A) that shift upwards the frequency of baseband signals. In a further feature of the embodiment, a tree structure of sets of upsample and upconversion elements is used. In another embodiment, the system includes digital (515) and analog (510) frequency adjustment systems in which the frequencies of the input signals are partially upshifted within both the digital and analog domains. Methods for digital upconversion of television signals are also provided.

摘要翻译： 提供了可用于有线电视头端系统的基带电视信号数字上变频的系统和方法。 在一个实施例中，该系统包括数字频率调整系统（120）和数模转换系统（130）。 在该实施例的特征中，数字频率调整系统（120）由数字上变频（210A）和向上移动基带信号频率的上采样元件（205A）组成。 在该实施例的另一特征中，使用上采样和上转换元件组的树结构。 在另一个实施例中，该系统包括数字（515）和模拟（510）频率调整系统，其中输入信号的频率在数字和模拟域内部分升高。 还提供了电视信号数字上变频的方法。

公开(公告)号：EP1484913B1

公开(公告)日：2013-01-23

申请号：EP04012918.1

申请日：2004-06-01

申请人： Broadcom Corporation

发明人： Gomez, Ramon A. ,  McMullin, Donald G.

IPC分类号： H04N5/40

CPC分类号： H04L63/04 ,  H03D7/161 ,  H04L63/062 ,  H04L63/08 ,  H04L63/123 ,  H04N7/10