公开(公告)号：WO2005050992A1

公开(公告)日：2005-06-02

申请号：PCT/KR2004/003005

申请日：2004-11-19

Applicant: MIWAGI INC. ,  LIM, Byeong Yong ,  YOON, In Soo

Inventor： LIM, Byeong Yong ,  YOON, In Soo

IPC: H04N7/16

CPC classification number: H04N21/4405 ,  H04N7/162 ,  H04N7/1675 ,  H04N21/234327 ,  H04N21/2347 ,  H04N21/2541 ,  H04N21/2543 ,  H04N21/25435 ,  H04N21/26606 ,  H04N21/4623 ,  H04N21/4627 ,  H04N21/835

Abstract: The present invention relates to a method and apparatus for providing a user with a multi-level quality service in a broadcast servicing system. A broadcast servicing system for providing a multi-level quality service according to the present invention comprises a multi-level video encoder, a multi-level audio encoder, a data encoder, a multiplexer, an encryptor, a user quality management system, a user quality authorization system, an encryption key generator, a multi-level video decoder, a multi-level audio decoder, a data decoder, a demultiplexer, a decryptor, an access quality control system, a smartcard, a degrader, and a demultiplexer between channels.

Abstract translation: 本发明涉及在广播服务系统中向用户提供多级质量服务的方法和装置。 根据本发明的用于提供多级质量服务的广播服务系统包括多级视频编码器，多级音频编码器，数据编码器，复用器，加密器，用户质量管理系统，用户 质量授权系统，加密密钥生成器，多级视频解码器，多级音频解码器，数据解码器，解复用器，解密器，接入质量控制系统，智能卡，降级器和信道之间的解复用器 。

公开(公告)号：WO2005064985A1

公开(公告)日：2005-07-14

申请号：PCT/KR2004/003499

申请日：2004-12-29

Applicant: MIWAGI INC. ,  LEE, Jae Bok ,  YOON, In Soo

Inventor： LEE, Jae Bok ,  YOON, In Soo

IPC: H04R1/32

CPC classification number: H04R1/323 ,  H04R2217/03

Abstract: The present invention relates to an apparatus and method for directional audio radiation in ultrasonic phase modulation or frequency modulation mode, using the linearity of an ultrasonic wave and the non-linearity of air as a medium for audio transmission. The present invention provides an apparatus for directional audio radiation comprises an ultrasonic phase modulation signal radiator or an ultrasonic frequency modulation signal radiator for receiving an audio signal, allowing the received audio signal to pass through a given correction device in order to obtain a correction signal, hase-modulating or frequency-modulating a first ultrasonic wave generated from an ultrasonic carrier wave generator using the correction signal, amplifying the phase­modulated or frequency-modulated first ultrasonic wave, and radiating the amplified ultrasonic wave; and an ultrasonic signal radiator for generating and amplifying a second ultrasonic wave having the same frequency as that of the first ultrasonic wave generated from the ultrasonic carrier wave generator, and radiating the amplified second ultrasonic wave into the air.

Abstract translation: 本发明涉及一种超声波相位调制或频率调制方式中定向音频辐射的装置和方法，该方法使用超声波的线性度和空气的非线性作为音频传输的介质。 本发明提供了一种用于定向音频辐射的装置，包括：超声相位调制信号辐射器或用于接收音频信号的超声频率调制信号辐射器，允许所接收的音频信号通过给定的校正装置以获得校正信号， 使用所述校正信号对由超声载波产生器产生的第一超声波进行调制或频率调制，放大经被解调或经调频的第一超声波，以及辐射所述放大的超声波; 以及超声波信号辐射体，用于产生和放大与从超声载波产生器产生的与第一超声波相同的频率的第二超声波，并将放大的第二超声波照射到空气中。