公开(公告)号：EP1814248B1

公开(公告)日：2018-04-25

申请号：EP05787993.4

申请日：2005-09-29

申请人： Leader Electronics Corporation

发明人： ISHIDA, Kenichi ,  TSUNEMOTO, Hideharu

IPC分类号： H04B17/00 ,  G01R23/173 ,  G01R27/28 ,  H03J7/26 ,  H04B1/26

CPC分类号： H03J1/0091 ,  H04B17/382

摘要： An improved channel detecting apparatus is provided for detecting a channel. The channel detecting apparatus comprises a channel search circuit (3). When a certain frequency is detected through a search sweep using a frequency sweep signal for a channel, the channel search circuit determines whether or not the detected frequency falls within a frequency range associated with the channel. The channel search circuit (3) comprises a controller (32). The controller can comprise a sweep stop timing circuit (320) and a sweep resume timing circuit (322). The sweep stop timing circuit (320) stops the search sweep when the output of the channel is generated in response to the search sweep using a frequency sweep signal. The sweep resume timing circuit (322) resumes the search sweep by determining that the detected frequency does not fall within the frequency range associated with the channel when a level of the output of the channel generated in response to the frequency sweep signal fixed at the detected frequency is below a threshold.

公开(公告)号：EP2858252A4

公开(公告)日：2016-03-09

申请号：EP13796616

申请日：2013-05-22

申请人： SONY CORP

发明人： YOSHIMOCHI NAOKI ,  YOKOKAWA TAKASHI ,  KOBAYASHI KENICHI

IPC分类号： H04B1/16 ,  H03J5/00 ,  H03J7/18 ,  H04H60/43 ,  H04N21/438

CPC分类号： H04N21/4263 ,  H03J1/0091 ,  H04H20/26 ,  H04H40/18 ,  H04N5/4401 ,  H04N5/50 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/4384 ,  H04N21/6112

公开(公告)号：EP2235998B1

公开(公告)日：2014-07-23

申请号：EP07853180.3

申请日：2007-11-29

申请人： Panasonic Automotive Systems Company of America Division of Panasonic Corporation of North America

发明人： JAISIMHA, Shree ,  KANJI, Mohammad, Reza ,  FUJISAWA, Tatsuya

IPC分类号： H04W84/00 ,  H03J1/00

CPC分类号： H03J1/0066 ,  H03J1/0091

公开(公告)号：EP2569957A4

公开(公告)日：2014-01-29

申请号：EP11791794

申请日：2011-05-05

申请人： WI LAN INC

发明人： WU SHIQUAN ,  SAMARASOORIYA VAJIRA

IPC分类号： H04B1/76 ,  H04N17/00 ,  H04R29/00

CPC分类号： H04N17/004 ,  H03J1/0091 ,  H04B1/76 ,  H04H60/41 ,  H04H60/43 ,  H04N5/50

摘要： A wireless microphone system broadcasts a pilot tone at the designated ATSC pilot position in the TV Band channel being used by the wireless microphone system. The pilot tone is a readily detectable waveform transmitted in the ATSC pilot position. The pilot tone can be generated by any one of: a standalone pilot tone generator; a pilot tone generator incorporated into a wireless microphone receiver; or, a pilot tone generator incorporated into a wireless microphone.

公开(公告)号：EP2296273B1

公开(公告)日：2013-01-23

申请号：EP09252181.4

申请日：2009-09-14

申请人： NXP B.V.

发明人： Brandsma, Ewout ,  De Waal, Klaas ,  Doris, Konstantinos ,  Janssen, Erwin

IPC分类号： H03J1/00

CPC分类号： H04N5/455 ,  H03J1/0091 ,  H04J14/0221 ,  H04L1/205 ,  H04L27/10 ,  H04N5/14 ,  H04N5/4401 ,  H04N5/50 ,  H04N21/4263 ,  H04N21/4345 ,  H04N21/4382

公开(公告)号：EP2512046A3

公开(公告)日：2012-12-05

申请号：EP12161949.8

申请日：2012-03-29

申请人： Nokia Corporation

发明人： Kangas, Mika Petteri ,  Luhtala, Harri Petteri ,  Scales, James

IPC分类号： H04H60/43 ,  H04H60/51 ,  H04N21/438 ,  H04N21/45 ,  H03J1/00 ,  H03J7/18 ,  H04N21/422

CPC分类号： H04H60/43 ,  H03J1/0066 ,  H03J1/0091 ,  H03J7/18 ,  H03J7/183 ,  H04H60/51 ,  H04N21/42202 ,  H04N21/4383 ,  H04N21/4524 ,  H04N21/6112

摘要： An apparatus comprising a processor and memory including computer program code, the memory and the computer program code configured to, with the processor, cause the apparatus to scan an electromagnetic spectrum for broadcast signals with respect to a signal strength threshold, the signal strength threshold based on at least one criterion, and detect any broadcast signals having a signal strength greater than or equal to the signal strength threshold, wherein a geographical location criterion comprises a current geographical location of the apparatus, and wherein the apparatus is configured to set the signal strength threshold according to the current geographical location of the apparatus.

公开(公告)号：EP2468003A1

公开(公告)日：2012-06-27

申请号：EP10809393.1

申请日：2010-08-18

申请人： Wi-LAN Inc.

发明人： SAMARASOORIYA, Vajira ,  WU, Shiquan

IPC分类号： H04N7/00 ,  H04N17/00

CPC分类号： H04N5/50 ,  H03J1/0091 ,  H04L27/0006 ,  H04N21/42203 ,  H04N21/4345 ,  H04N21/4383 ,  H04W16/14

摘要： A television band device has DTV pilot signal detection logic that generates DTV pilot signal detection decisions associated with a monitored television channel. A wireless microphone detection logic generates wireless microphone detection decisions associated with the monitored television channel. A sensing manager receives DTV pilot signal detection decisions and the wireless microphone detection decisions and analyzes at least one the respective decisions to determine whether the monitored television channel is available white space.

公开(公告)号：EP1998447A3

公开(公告)日：2010-03-17

申请号：EP08103611.3

申请日：2008-04-18

申请人： Vestel Elektronik Sanayi ve Ticaret A.S.

发明人： Sezer, Cem Cabot Izmir Yazilim ve Donanim Tic. San. A.?. ,  Yilmaz, Evren Gokhan Cabot Izmir Yazilim ve Donanim Tic. San. A.?.

IPC分类号： H03J1/00

CPC分类号： H03J1/0091 ,  H03J2200/21 ,  H04N5/4401 ,  H04N5/46 ,  H04N5/50 ,  H04N21/42638 ,  H04N21/4345

摘要： This invention speeds up channel search process performed on multiple broadcast types by a new method which estimates the broadcast type by the use of power levels which are extracted from the given frequency spectrum. By using the power level distribution on a given frequency spectrum, the broadcast type of a signal (analog/digital) is estimated and this estimation is used in channel search procedure by fistly testing each frequency step with its estimated broadcast type. This method can be used on all set top boxes, digital plasma-tft televisions, integrated digital televisions which have the support for multiple broadcast types.

公开(公告)号：EP2062371A2

公开(公告)日：2009-05-27

申请号：EP07841515.5

申请日：2007-08-29

申请人： Motorola, Inc.

发明人： PINDER, Ellis, A.

IPC分类号： H04B7/00 ,  H04Q7/20

CPC分类号： H04W48/16 ,  H03J1/0091 ,  H04W52/0219 ,  H04W52/0245 ,  H04W88/04 ,  H04W88/06 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/22

摘要： A communication network (100) includes a plurality of communication devices (102, 104) communicating over multiple systems or channels and also communicating over a short range link, such as a personal area Network (PAN) link (106). The plurality of communication devices (102, 104) utilize pre-stored scan lists (156, 166) and cooperative scanning (600). The cooperative scanning involves partitioning the scan lists (156, 166) among the plurality of devices via the short range link to minimize battery consumption or enhance scan performance.

公开(公告)号：EP2051392A1

公开(公告)日：2009-04-22

申请号：EP07806379.9

申请日：2007-08-30

申请人： CLARION Co., Ltd.

发明人： KOYAMA, Kazuo ,  ISHIDA, Masanori ,  INAKO, Kazuyoshi ,  NAKAJIMA, Naoki

IPC分类号： H04B1/16 ,  H03J5/02

CPC分类号： H03J1/0091 ,  H04H20/30 ,  H04H20/89 ,  H04H40/18 ,  H04H60/41 ,  H04H2201/183

摘要： A broadcasting receiver suitable for receiving a broadcasting signal transmitted in an IBOC signal format, comprises: a channel seek directing means for directing to start a channel seeking operation that selects selectable channel in an order of frequency; a channel seek controlling means for starting and controlling the channel seeking operation in accordance with the direction of the channel seek directing means; and a multichannel determining means for determining whether a selected frequency channel is providing multichannel digital broadcasting or not; and wherein the channel seek controlling means selects a next subchannel in an order of identification code before searching for the next frequency channel, if it is determined by the multichannel determining means that the selected frequency channel is providing the multichannel digital broadcasting.

摘要翻译： 适用于接收以IBOC信号格式发送的广播信号的广播接收机包括：信道寻道引导装置，用于引导以频率顺序选择可选信道的频道搜索操作; 信道搜索控制装置，用于根据信道搜索引导装置的方向启动和控制信道寻找操作; 以及用于确定所选择的频道是否正在提供多声道数字广播的多声道确定装置; 并且其中，如果由所述多通道确定装置确定所选择的频道正在提供所述多声道数字广播，则所述频道搜索控制装置以搜索下一个频道之前的识别码的顺序选择下一个子信道。