专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2021108471A 受信装置有权
公开(公告)号：JP2021108471A
公开(公告)日：2021-07-29
申请号：JP2021064054
申请日：2021-04-05
申请人：シャープ株式会社
发明人：鈴木秀樹 , 清水隆匡 , 小笠原嘉靖 , 西垣智夫
IPC分类号： H04N21/439 , H04B1/16 , H04H40/36 , H04N21/435
摘要：【課題】番組が切り替わるときに所望の音声アセットを選択する受信装置を提供する。【解決手段】受信装置の制御部331において、サービス検出部332から入力されたサービス情報が示すストリーム毎の再生方式のうち、音声復号部314が処理出来る再生方式の最も上位の再生方式を選択する方式選択部333bは、MPT(MMT Package Table)が更新されるとき、MH−音声コンポーネント記述子から、更新前に選択された音声アセットに対応するMH−音声コンポーネント記述子と同一の所定の要素を含むMH−音声コンポーネント記述子に対応する音声アセットを選択し、更新前に選択された音声アセットと同一内容を示す異なる音声モードの音声アセットの存在を示すサイマルキャストグループ識別が変化する場合、処理可能な音声モードの音声アセットからコンポーネントタグ値が最小の音声アセットを選択し、音声情報を表示部に表示させる。【選択図】図14

7. 发明专利

JP2001007872A DIGITAL AM DEMODULATOR 失效
公开(公告)号：JP2001007872A
公开(公告)日：2001-01-12
申请号：JP2000132047
申请日：2000-05-01
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： MEYER MATTHIAS
IPC分类号： H04N5/60 , H03D1/00 , H03D1/22 , H04H20/00 , H04H40/36 , H04J1/00 , H04L7/00 , H04L27/06 , H04H5/00
摘要： PROBLEM TO BE SOLVED: To obtain a digital demodulator where the number of parts is minimum and that can be operated without adjustment. SOLUTION: A loop filter 2 receives a multiplexed signal at an input terminal of a 1st CORDIC 1, an output signal of an accumulator 4 at its phase input terminal, and an output signal not assigned to the same coordinate as an amplitude input terminal in use, a 1st multiplex stage 3 multiplexes an output signal on a frequency selection signal denoting a pilot nominal frequency and an input terminal of the accumulator 4 receives the output signal from the 1st multiplex stage 3. One amplitude input terminal of the accumulator of a 2nd CORDIC 7 receives the output signal from a multiplier 5, an input terminal of the multiplier receives the output signal from the accumulator 4, multiplies '2' with it and an output terminal of the 2nd CORDIC 7 gives a demodulated difference acoustic signal.

9. 发明专利

JPH11215077A AM TEREO BROADCASTING TRANSMITTER 失效
公开(公告)号：JPH11215077A
公开(公告)日：1999-08-06
申请号：JP2907298
申请日：1998-01-28
申请人： KENWOOD CORP
发明人： OKAZAKI RYUICHI , SHIRAISHI KENICHI
IPC分类号： H04S1/00 , H03C1/00 , H04H1/00 , H04H40/36 , H04H40/45 , H04H5/00
摘要： PROBLEM TO BE SOLVED: To produce and send AM stereo modulated waves, without using a limiter. SOLUTION: This AM stereo broadcasting transmitter 1 converts left and right sound signals which are outputted from a sound signal source 2 into a sum signal and a difference signal by a matrix circuit 3, adds direct current offset to the sum signal by an offset adder circuit 4 and performs orthogonal modulation by an orthogonal modulator circuit, which receives an output signal of the circuit 4, the difference signal and a carrier. On the other hand, it calculates the cosine value of a phase angle θ between a vector sum signal of the output signal of the circuit 4 and the difference signal and the output signal of the circuit 4 by a cos θ extraction arithmetic circuit 12, multiplies an output signal of the orthogonal modulator circuit by the cosine value of the phase angle θ with multiplier 13 and sends them as AM stereo modulated waves.

10. 发明专利

JPH11150520A FM STEREO SIGNAL ANALYSIS DEVICE AND ITS ANALYSIS METHOD 失效
公开(公告)号：JPH11150520A
公开(公告)日：1999-06-02
申请号：JP31716597
申请日：1997-11-18
申请人： ADVANTEST CORP
发明人： ASAMI KOJI
IPC分类号： G01R29/08 , G01R31/00 , H04H1/00 , H04H40/36 , H04H5/00
摘要： PROBLEM TO BE SOLVED: To analyze the separation degree of an FM stereo signal through the use of a unit constituting a mixed signal IC tester as a standard by receiving the IF signal output of a device to be tested, demodulating arithmetically the FM stereo signal and obtaining the separation degree. SOLUTION: A signal generator 10 generate the FM-modulated stereo signal by using an arbitrary waveform generator, for example. A DUT 90 is the device to be tested. Relating to a digitizer 20, a main part is constituted of an A/D converter and a memory and the analog signal of several ten MHz is A/D- converted from DC. When a signal to be measured is from several hundred MHz to several GHz , a sampling digitizer where a sampling head is added to the digitizer is used. A DSP(digital signal processor) 30 is a private processor executing an algebraic operation processing on the inputted digital signal on a real time basis and at high speed. A display means 40 is a monitor for displaying an analyzed result, or the like.

你已经成功收藏专利！

检索式保存成功!

IPRDB