公开(公告)号：KR100537499B1

公开(公告)日：2005-12-19

申请号：KR1020020044304

申请日：2002-07-26

Applicant: 삼성전자주식회사

Inventor： 장경훈 ,  박종애 ,  황효선

IPC: H04L1/00

CPC classification number: H04L65/608 ,  H04L1/007 ,  H04L1/1671 ,  H04L1/1809 ,  H04L1/1835 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/2425 ,  H04L47/26 ,  H04L47/27 ,  H04L47/32 ,  H04L47/34 ,  H04L47/35

Abstract: A method for generating packet-based transmission control parameters includes (a) receiving class information of an audio-video (AV) application and characteristic information of an AV packet, from the AV application, (b) receiving status information of a wireless channel and buffer storage time information of the AV packet, from a medium access control (MAC) layer, and (c) generating and outputting the packet-based transmission control parameters on the basis of the received information. In addition, a selective retransmission method includes (a) transmitting packets of an MPEG-2 frame in real-time, (b) checking for any transmission error after the transmission, and (c) if any transmission error is generated, retransmitting only packets of an I-frame. Therefore, it is possible to efficiently support AV service in wireless communication by dynamically controlling transmission control parameters according to a buffer status and by reflecting the characteristics of the AV frames.

公开(公告)号：KR100474853B1

公开(公告)日：2005-03-10

申请号：KR1020030005929

申请日：2003-01-29

Applicant: 삼성전자주식회사

Inventor： 우상현 ,  박종애

IPC: H04B1/40

CPC classification number: H04B1/30 ,  H04B1/08

Abstract: 본 발명에 의한 원칩화된 다이렉트 컨버젼 송수신기는, 믹서부와 지역 발진기가 회로로서 구비된 기판; 믹서부에서 방사되는 신호 및 지역 발진기에서 방사되는 신호 누설의 영향을 차폐시키도록, 기판내에서 믹서부와 지역 발진기 사이에 소정 폭과 소정 깊이로 형성되고 그 내부가 도전성 플러그로 채워진 포지티브 홀; 기판 상부에 마련되어, 안테나를 통해 수신된 신호가 믹서로 입력되는 과정에서 발생된 신호 누설 및 지역 발진기로부터 믹서로 기준 신호가 입력되는 과정에서 발생된 신호 누설을 차단하는 차폐 접지면; 차폐 접지면 상부에 마련되어, 믹서부 및 지역 발진기를 연결하는 제1 배선; 및 기판과 차폐 접지면 사이, 및 차폐 접지면 상부에서 제1 배선을 덮도록 적층된 유전층이 원칩화되어 포함된 것을 특징으로 한다. 따라서, 대부분의 신호 누설이 차폐 접지면과 포지티브 홀에 의해 효과적으로 차단되어 디씨 옵셋의 발생이 근본적으로 억제될 수 있고, 기존의 디씨 옵셋을 줄이기 위한 회로가 추가된 구조보다 크기, 소비 전력 및 제조 비용을 줄일 수 있다. 또한 본 발명은 원칩화된 구조로서 신호누설에 의한 자체 믹싱을 근본적으로 방지하므로, 변조방식과 주파수 대역에 관계없이 사용될 수 있다. 또한 CMOS, SiGe, GaAs와 같은 기판특성에 무관하게 디씨 옵셋을 현저히 줄일 수 있다.

公开(公告)号：KR1020040105274A

公开(公告)日：2004-12-16

申请号：KR1020030035969

申请日：2003-06-04

Applicant: 삼성전자주식회사

Inventor： 장경훈 ,  고성제 ,  이옥선 ,  김윤 ,  박종애 ,  황필용

IPC: H04N19/86 ,  H04N19/60

CPC classification number: H04N19/86 ,  H04N19/625

Abstract: PURPOSE: A method for removing a blocking artifact included in an image encoded by BDCT(Block Discrete Cosine Transform) is provided to effectively reproduce a received image by removing the blocking artifact without deleting the edge of the received image and to reduce the quantity of calculations for removing the blocking artifact to process the received image in real time. CONSTITUTION: An image encoded by BDCT is received. The frequency characteristic of the received image is measured. The received image is moved by at least one pixel in column and row directions, and the frequency characteristic of the moved image is measured. When the difference between the frequency characteristic of the received image and the frequency characteristic of the moved image exceeds a predetermined range, a high-frequency component of the image is removed.

Abstract translation: 目的：提供一种用于去除由BDCT（块离散余弦变换）编码的图像中包含的块伪影的方法，以通过去除块伪像而无需删除接收到的图像的边缘并有效减少计算量来有效地再现接收到的图像 用于去除块伪影以实时处理接收到的图像。 构成：接收BDCT编码的图像。 测量接收图像的频率特性。 接收到的图像在列和行方向上移动至少一个像素，并且测量移动图像的频率特性。 当接收图像的频率特性与移动图像的频率特性之间的差超过预定范围时，图像的高频分量被去除。

公开(公告)号：KR1020040020639A

公开(公告)日：2004-03-09

申请号：KR1020020052289

申请日：2002-08-31

Applicant: 삼성전자주식회사

Inventor： 장경훈 ,  황효선 ,  박종애

IPC: H04B7/26

CPC classification number: H04L65/608 ,  H04L29/06 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/30 ,  H04L65/80 ,  H04W28/22

Abstract: PURPOSE: A method and apparatus for dynamically controlling a real time multimedia data generation rate are provided to be quickly adopted for a radio channel state and effectively use resources by detecting characteristics of a radio channel and reflecting the detected result for a multimedia data generation rate. CONSTITUTION: A data generator generates multimedia data according to a data generation rate and transmits it to a mobile terminal or a wireless access node(AP) through an RTP(Real Time Protocol)(310). An RTCP(Real-time Transport Control Protocol) receives information on a transmission buffer transmitting multimedia and multimedia data loss rate from an MAC(Medium Access Control) layer(320). A generation rate of the multimedia data is calculated and transmitted to the data generator(330). The data generator generates multimedia data on a real time basis according to the received multimedia data generation rate and transmits it to the RTP(340).

Abstract translation: 目的：提供一种用于动态控制实时多媒体数据生成速率的方法和装置，用于无线电信道状态快速采用，并通过检测无线电信道的特性并反映多媒体数据生成速率的检测结果有效地使用资源。 构成：数据发生器根据数据生成速率生成多媒体数据，并通过RTP（实时协议）（310）将其发送到移动终端或无线接入节点（AP）。 RTCP（实时传输控制协议）从MAC（媒体访问控制）层（320）接收关于传输多媒体和多媒体数据丢失率的传输缓冲区的信息。 计算多媒体数据的生成速率并将其发送到数据生成器（330）。 数据发生器根据接收到的多媒体数据生成速率实时生成多媒体数据，并将其发送到RTP（340）。

公开(公告)号：KR1020040006398A

公开(公告)日：2004-01-24

申请号：KR1020020040672

申请日：2002-07-12

Applicant: 삼성전자주식회사

Inventor： 우상현 ,  이성수 ,  박종애

IPC: H04B1/26

CPC classification number: H03D7/165 ,  H04B1/406

Abstract: PURPOSE: A method and an apparatus for receiving a multi-band RF(Radio Frequency) in a mobile communication system are provided to considerably reduce the number of RF filters and local oscillators by using a wideband BPF(Band Pass Filter) and an LNA(Low Noise Amplifier). CONSTITUTION: An antenna unit(10) receives an RF wave signal with respect to 4 bands or more which are mutually not overlapped. The first filtering unit(20) filters the first wideband including the first and second bands and the second wideband including the third and fourth bands from the RF wave signal received from the antenna unit(10). An amplifying unit(30) performs the low noise amplification of the first and second wideband RF wave signals provided from the first filtering unit(20). A mode signal generating unit(40) generates the first to fourth mode signals. The second filtering unit(60) filters the third wideband including the second and third bands and the fourth wideband including the first and fourth bands from the first and second wideband RF wave signals provided from the amplifying unit(30). A path setup unit(50) sets a path between an output end of the amplifying unit(30) and an input end of the second filtering unit(60) according to two bands simultaneously received among the first to fourth bands. A frequency downward converting unit having an oscillation unit(70), a mixing unit(80) and the third filtering unit(90) generates a two-band IF(Intermediate Frequency) from the difference of the two-band RF wave signal provided from the second filtering unit(60) and the first and second oscillation frequencies according to the path set in the path setup unit(50).

Abstract translation: 目的：提供一种用于在移动通信系统中接收多频带​​RF（Radio Frequency）的方法和装置，以通过使用宽带BPF（带通滤波器）和LNA（频带）来显着减少RF滤波器和本地振荡器的数量 低噪声放大器）。 构成：天线单元（10）接收相对于不重叠的4个或更多个的RF波信号。 第一滤波单元（20）从从天线单元（10）接收的RF波信号中滤出包括第一和第二频带的第一宽带和包括第三和第四频带的第二宽带。 放大单元（30）执行从第一滤波单元（20）提供的第一和第二宽带RF波信号的低噪声放大。 模式信号生成单元（40）生成第一至第四模式信号。 第二滤波单元（60）从放大单元（30）提供的第一和第二宽带RF波信号中滤除包括第二和第三频带的第三宽带和包括第一和第四频带的第四宽带。 路径设置单元（50）根据在第一至第四频带中同时接收的两个频带，在放大单元（30）的输出端和第二滤波单元（60）的输入端之间设置路径。 具有振荡单元（70），混合单元（80）和第三滤波单元（90）的频率向下变换单元根据从两个频带RF波信号的差异 第二滤波单元（60）以及根据在路径设置单元（50）中设置的路径的第一和第二振荡频率。