公开(公告)号：WO2005055607A1

公开(公告)日：2005-06-16

申请号：PCT/KR2004/002917

申请日：2004-11-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  HANYANG UNIVERSITY ,  KIM, Wook-Joong ,  KI, Myung-Seok ,  KIM, Kyu-Heon ,  KIM, Jin-Woong ,  JANG, Euee-Seon ,  LEE, Sun-Young ,  OH, Hyun-Jong ,  PARK, Sung-Won ,  WON, Jong-Woo

Inventor： KIM, Wook-Joong ,  KI, Myung-Seok ,  KIM, Kyu-Heon ,  KIM, Jin-Woong ,  JANG, Euee-Seon ,  LEE, Sun-Young ,  OH, Hyun-Jong ,  PARK, Sung-Won ,  WON, Jong-Woo

IPC: H04N7/24

CPC classification number: H04N1/41 ,  H04N1/32128 ,  H04N19/152 ,  H04N19/162 ,  H04N19/17 ,  H04N19/196 ,  H04N19/23 ,  H04N19/30 ,  H04N19/463 ,  H04N19/59 ,  H04N19/60 ,  H04N19/70 ,  H04N2201/3225

Abstract: Disclosed are a system and method for encoding and decoding an image. The image compression system includes an image segmentation unit (110) for segmenting a first image into a plurality of sub-images; a first encoding unit (120) for encoding the sub-images to output sub-image bitstreams; a BMAP construction unit (130) for calculating the quantity of information of each sub-image bitstream and generating BMAP information using the calculated quantity of information and information on construction of each sub-image; and a bitstream combining unit (150) for combining the sub-image bitstreams and BMAP information.

Abstract translation: 公开了一种用于对图像进行编码和解码的系统和方法。 图像压缩系统包括用于将第一图像分割成多个子图像的图像分割单元（110）; 用于将子图像编码为输出子图像比特流的第一编码单元（120）; 用于计算每个子图像比特流的信息量并使用所计算的信息量和关于每个子图像的构造的信息来生成BMAP信息的BMAP构造单元（130） 以及用于组合子图像比特流和BMAP信息的比特流组合单元（150）。

公开(公告)号：WO2007066986A1

公开(公告)日：2007-06-14

申请号：PCT/KR2006/005261

申请日：2006-12-07

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  CHEONG, Won-Sik ,  AHN, Sang-Woo ,  CHA, Ji-Hun ,  JOUNG, Ye-Sun ,  YOO, Young-Jae ,  YOO, Won-Hyuck ,  KIM, Kyu-Heon

Inventor： CHEONG, Won-Sik ,  AHN, Sang-Woo ,  CHA, Ji-Hun ,  JOUNG, Ye-Sun ,  YOO, Young-Jae ,  YOO, Won-Hyuck ,  KIM, Kyu-Heon

IPC: H04N7/00

CPC classification number: H04N21/234309 ,  G06F17/3092 ,  G11B27/034 ,  G11B27/105 ,  G11B27/34 ,  H04H20/95 ,  H04N21/2389 ,  H04N21/25866 ,  H04N21/4385 ,  H04N21/6112 ,  H04N21/854 ,  H04N21/8545

Abstract: Provided are a terrestrial DMB contents editing and authoring apparatus and a terrestrial DMB contents providing system having the same. The terrestrial DMB contents providing system includes: a terrestrial DMB contents transforming apparatus for transforming a terrestrial digital television (DTV) contents to a predetermined data format to transmit as a terrestrial DMB; a terrestrial DMB contents editing and authoring apparatus for providing an interface to a user to edit and author the transformed format of terrestrial DMB interactive contents, and editing and authoring the terrestrial DMB interactive contents according to temporal/spatial arrangement and behavior events of objects based on editing and authoring information of the user; a terrestrial DMB contents storing apparatus for storing the terrestrial DMB interactive contents; and a terrestrial DMB contents transmitting apparatus for transmitting the stored terrestrial DMB contents to be suitable to a terrestrial DMB transmit format according to a transmit schedule.

Abstract translation: 提供了一种陆地DMB内容编辑和创作设备以及具有该DMB内容的陆地DMB内容提供系统。 陆地DMB内容提供系统包括：地面DMB内容变换装置，用于将地面数字电视（DTV）内容转换成预定的数据格式，作为陆地DMB发送; 陆地DMB内容编辑和创作装置，用于向用户提供界面以编辑和编辑地面DMB交互式内容的变换格式，以及根据对象的时间/空间布置和行为事件编辑和创作地面DMB交互式内容 用户的编辑和创作信息; 用于存储地面DMB交互内容的地面DMB内容存储装置; 以及地面DMB内容发送装置，用于根据发送时间表发送适合于地面DMB发送格式的所存储的地面DMB内容。

公开(公告)号：WO2006062360A1

公开(公告)日：2006-06-15

申请号：PCT/KR2005/004195

申请日：2005-12-08

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  NET & TV INC. ,  CHEONG, Won-Sik ,  KIM, Kyu-Heon ,  LIM, Young-Kwon

Inventor： CHEONG, Won-Sik ,  KIM, Kyu-Heon ,  LIM, Young-Kwon

IPC: H04N7/00

CPC classification number: H04H60/27 ,  H04H60/90 ,  H04H60/93 ,  H04N21/235 ,  H04N21/434 ,  H04N21/4341 ,  H04N21/435 ,  H04N21/4384 ,  H04N21/44012 ,  H04N21/6112

Abstract: Provided is a digital multimedia broadcasting (DMB) receiving terminal for decoding broadcasting contents at a high speed, the terminal including: a tuner for selecting broadcasting signals of a predetermined channel based on a user request from a wireless broadcasting signal inputted from the outside; a tuner and channel decoder for acquiring ensembles by performing channel decoding on the broadcasting signals of the channel; a storage for storing decoding information required for decoding broadcasting contents of the channel selected by a user; an ensemble and transport stream demultiplexer for acquiring transport streams from the ensembles by using the decoding information stored in the storage, extracting Program Map Table (PMT) and elementary stream (ES) from the transport streams by using the decoding information, and extracting Initial Object Descriptor (IOD) included in the PMT; a decoder for decoding the ES and the IOD; and a scene compositor for forming a broadcasting contents scene by using the information decoded in the decoder.

Abstract translation: 提供了一种用于高速解码广播内容的数字多媒体广播（DMB）接收终端，该终端包括：根据从外部输入的无线广播信号，根据用户请求选择预定频道的广播信号的调谐器; 调谐器和信道解码器，用于通过对信道的广播信号执行信道解码来获取集合; 用于存储用于解码由用户选择的频道的广播内容所需的解码信息的存储器; 用于通过使用存储在存储器中的解码信息从集合获取传输流的集成和传输流解复用器，通过使用解码信息从传输流中提取节目映射表（PMT）和基本流（ES），并且提取初始对象 描述符（IOD）包含在PMT中; 用于对ES和IOD进行解码的解码器; 以及用于通过使用在解码器中解码的信息形成广播内容场景的场景合成器。

公开(公告)号：WO2006062324A1

公开(公告)日：2006-06-15

申请号：PCT/KR2005/004139

申请日：2005-12-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  JEONG, Young-ho ,  CHO, Sam-Mo ,  KIM, Geon ,  AHN, Chung-Hyun ,  HAHM, Young-Kwon ,  KIM, Kyu-Heon ,  LEE, Soo-In

Inventor： JEONG, Young-ho ,  CHO, Sam-Mo ,  KIM, Geon ,  AHN, Chung-Hyun ,  HAHM, Young-Kwon ,  KIM, Kyu-Heon ,  LEE, Soo-In

IPC: G06F19/00

CPC classification number: H04H20/57 ,  G08G1/092 ,  H04H20/53 ,  H04H20/55 ,  H04H60/27 ,  H04H60/70

Abstract: Provided are a recording medium for a point of interest/news information service frame and an apparatus for processing a TPEG based application service using the same. The apparatus includes: a receiver for receiving a TPEG protocol based broadcasting stream related to traffic and travel information (TTI) through a broadcasting communication network; an analyzer for analyzing the received broadcasting frame, discarding frame having errors and extracting frames having no errors; a decoder for classifying the extracted frames by TTI related data through analyzing characteristics of service components of the extracted frame; a storing unit for storing and managing the classified TTI related data into corresponding TTI related database; a controller for receiving a TTI service request from a user, searching a corresponding TTI related database according to the TTI service request and outputting the searched TTI related data; and an outputting unit for outputting the corresponding TTI related data.7.

Abstract translation: 提供了一种用于兴趣点/新闻信息服务帧的记录介质以及使用该记录媒体处理基于TPEG的应用服务的装置。 该装置包括：通过广播通信网络接收与业务和旅行信息（TTI）相关的基于TPEG协议的广播流的接收机; 用于分析所接收的广播帧的分析器，丢弃具有错误的帧并提取没有错误的帧; 解码器，用于通过分析提取的帧的服务组件的特征来通过TTI相关数据对提取的帧进行分类; 存储单元，用于将分类的TTI相关数据存储和管理到相应的TTI相关数据库中; 控制器，用于从用户接收TTI服务请求，根据TTI服务请求搜索对应的TTI相关数据库，并输出所搜索的TTI相关数据; 以及输出单元，用于输出相应的TTI相关数据。

公开(公告)号：WO2007046644A1

公开(公告)日：2007-04-26

申请号：PCT/KR2006/004260

申请日：2006-10-19

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KWANGWOON UNIVERSITY RESEARCH INSTITUTE FOR INDUSTRY COOPERATION ,  SEO, Jeong-Il ,  KIM, Wook-Joong ,  KIM, Kyu-Heon ,  KANG, Kyeong-Ok ,  HONG, Jin-Woo ,  LEE, Yung-Lyul ,  HAN, Ki-Hun ,  HUR, Jae-Ho ,  SIM, Dong-Gyu ,  OH, Seoung-Jun

Inventor： SEO, Jeong-Il ,  KIM, Wook-Joong ,  KIM, Kyu-Heon ,  KANG, Kyeong-Ok ,  HONG, Jin-Woo ,  LEE, Yung-Lyul ,  HAN, Ki-Hun ,  HUR, Jae-Ho ,  SIM, Dong-Gyu ,  OH, Seoung-Jun

IPC: H04N7/32

CPC classification number: H04N19/61 ,  H04N19/129 ,  H04N19/159 ,  H04N19/176

Abstract: Provided is an apparatus and method for encoding/decoding moving pictures based on adaptive scanning. The moving picture apparatus and method can increase a compression rate based on adaptive scanning by performing intra prediction onto blocks of a predetermined size, and scanning coefficients acquired from Discrete Cosine Transform (DCT) of a residue signal and quantization differently according to the intra prediction mode. The moving picture encoding apparatus includes: a mode selector for selecting and outputting a prediction mode; a predictor for predicting pixel values of pixels to be encoded of an input video based on the prediction mode to thereby output a residue signal block; a transform/quantization unit for performing DCT onto the residue signal block and quantizing the transformed residue signal block; and an encoder for adaptively scanning and encoding the quantized residue signal block based on the prediction mode.

Abstract translation: 提供了一种基于自适应扫描对运动图像进行编码/解码的装置和方法。 运动图像装置和方法可以通过对预定大小的块执行帧内预测，​​并且根据帧内预测模式对从残差信号的离散余弦变换（DCT）获取的量化和量化进行不同的量化，从而基于自适应扫描来增加压缩率 。 运动图像编码装置包括：模式选择器，用于选择和输出预测模式; 预测器，用于基于预测模式预测要编码的输入视频的像素的像素值，从而输出残差信号块; 变换/量化单元，用于对残差信号块执行DCT并量化变换后的残差信号块; 以及用于基于预测模式自适应扫描和编码量化残差信号块的编码器。

公开(公告)号：WO2007043775A1

公开(公告)日：2007-04-19

申请号：PCT/KR2006/004000

申请日：2006-10-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KWANGWOON UNIVERSITY RESEARCH INSTITUTE FOR INDUSTRY COOPERATION ,  SEO, Jeong-Il ,  SIM, Dong-Gyu ,  KIM, Wook-Joong ,  KIM, Kyu-Heon ,  KANG, Kyeong-Ok ,  HONG, Jin-Woo ,  OH, Seung-Jun ,  LEE, Yung-Lyul ,  AHN, Chang-Beom ,  PARK, Sea-Nae

Inventor： SEO, Jeong-Il ,  SIM, Dong-Gyu ,  KIM, Wook-Joong ,  KIM, Kyu-Heon ,  KANG, Kyeong-Ok ,  HONG, Jin-Woo ,  OH, Seung-Jun ,  LEE, Yung-Lyul ,  AHN, Chang-Beom ,  PARK, Sea-Nae

IPC: H04N7/24

CPC classification number: H04N21/2365 ,  H04N21/21805 ,  H04N21/23424 ,  H04N21/2383 ,  H04N21/4122 ,  H04N21/4312 ,  H04N21/4314 ,  H04N21/43615 ,  H04N21/44016

Abstract: Provided is a multiple camera system, and more particularly, a method and apparatus for processing hopping default views in an apparatus for encoding/decoding video streams of multiple view positions. The encoding apparatus for the multiple camera system includes an encoder for receiving video signals of multiple view positions, and encoding the video signals based on a predetermined default Group of Pictures (GoP); a default GoP selector for providing the default GoP information to the encoder; and a multiplexer for multiplexing the encoded video signals and sequentially outputting only the default GoP.

Abstract translation: 提供了一种多摄像机系统，更具体地，涉及一种用于对多视点位置的视频流进行编码/解码的装置中的跳跃默认视图的处理方法和装置。 用于多相机系统的编码装置包括用于接收多视点位置的视频信号的编码器，并且基于预定的默认图像组（GoP）对视频信号进行编码; 用于向编码器提供默认GoP信息的默认GoP选择器; 以及多路复用器，用于对编码的视频信号进行多路复用，并且仅依次输出默认的GoP。

公开(公告)号：WO2006052057A1

公开(公告)日：2006-05-18

申请号：PCT/KR2005/002409

申请日：2005-07-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KIM, Wook-Joong ,  AHN, Sang-Woo ,  LEE, In-Jae ,  KI, Myung-Seok ,  KIM, Kyu-Heon ,  HONG, Jin-Woo

Inventor： KIM, Wook-Joong ,  AHN, Sang-Woo ,  LEE, In-Jae ,  KI, Myung-Seok ,  KIM, Kyu-Heon ,  HONG, Jin-Woo

IPC: H04N13/02

CPC classification number: H04N5/23248 ,  H04N13/221 ,  H04N13/282

Abstract: Provxded is a method for convergent type three- dimensional (3D) multi-viewpoint image acquisition. The method for acquiring a multi-viewpoint image in an image acquisition apparatus comprises the steps of : converting the image acquisition apparatus to a multi-viewpoint image photographing mode; if converted to the multi-viewpoint image photographing mode in the converting step, providing a plurality of geometric shapes to set a position of an object to be photographed within a screen and selecting a desired shape of the geometric shapes in response to an inputted shape selection signal; if the desired geometric shape is selected in the shape providing step, adjusting a position and a size of the selected geometric shape in response to a shape adjustment signal; and photographing a whole image having the object that places within the adjusted geometric shape in the adjusting step.

Abstract translation: Provxded是收敛型三维（3D）多视点图像采集的方法。 在图像获取装置中获取多视点图像的方法包括以下步骤：将图像获取装置转换成多视点图像拍摄模式; 如果在转换步骤中转换为多视点图像拍摄模式，则提供多个几何形状以设置在屏幕内要拍摄的对象的位置，并响应于输入的形状选择来选择几何形状的期望形状 信号; 如果在形状提供步骤中选择期望的几何形状，则响应于形状调整信号来调整所选择的几何形状的位置和尺寸; 并且在调整步骤中拍摄具有位于调整后的几何形状内的对象的整个图像。

公开(公告)号：WO2007139266A1

公开(公告)日：2007-12-06

申请号：PCT/KR2006/005783

申请日：2006-12-27

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KWANGWOON UNIVERSITY RESEARCH INSTITUTE FOR INDUSTRY COOPERATION ,  SEO, Jeong-Il ,  JEONG, Se-Yoon ,  KIM, Kyu-Heon ,  KANG, Kyeong-Ok ,  HONG, Jin-Woo ,  SIM, Dong-Gyu ,  LEE, Yung-Lyul ,  OH, Seoung-Jun ,  AHN, Chang-Beom ,  NAM, Jung-Hak

Inventor： SEO, Jeong-Il ,  JEONG, Se-Yoon ,  KIM, Kyu-Heon ,  KANG, Kyeong-Ok ,  HONG, Jin-Woo ,  SIM, Dong-Gyu ,  LEE, Yung-Lyul ,  OH, Seoung-Jun ,  AHN, Chang-Beom ,  NAM, Jung-Hak

IPC: H04N7/32

CPC classification number: H04N19/90 ,  H04N19/107 ,  H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/19 ,  H04N19/46 ,  H04N19/593 ,  H04N19/61

Abstract: Provided is a video encoding and decoding method and apparatus using pixel- based prediction. A pixel-based video encoding apparatus includes a block prediction unit, a residual image generation unit, a pixel prediction unit, and an entropy-coding unit. The block prediction unit performs temporal or spatial prediction between a reference image and a current image in order to generate a prediction block corresponding to a current block to be encoded. The residual image generation unit generates a residual image block composed of a residual signal corresponding to a difference between pixels of the prediction block and pixels of the current block. The pixel prediction unit determines whether to apply differential pulse coded modulation (DPCM) to each of pixels of the residual image block based on a rate distortion optimization (RDO) value calculated for the case where DPCM is applied to each of the pixels of the residual image block and a RDO value calculated for the case where DPCM is not applied to each of the pixels of the residual image block. The entropy-coding unit performs entropy-coding on the residual image block.

Abstract translation: 提供了一种使用基于像素的预测的视频编码和解码方法和装置。 基于像素的视频编码装置包括块预测单元，残差图像生成单元，像素预测单元和熵编码单元。 块预测单元执行参考图像和当前图像之间的时间或空间预测，以便生成与要编码的当前块相对应的预测块。 剩余图像生成单元生成由与预测块的像素和当前块的像素之间的差对应的残差信号构成的残差图像块。 像素预测单元基于将DPCM应用于剩余图像的每个像素的情况计算的速率失真优化（RDO）值来确定是否对残差图像块的每个像素应用差分脉冲编码调制（DPCM） 图像块和对于DPCM未被应用于残差图像块的每个像素的情况计算的RDO值。 熵编码单元对残差图像块进行熵编码。

公开(公告)号：WO2007081116A1

公开(公告)日：2007-07-19

申请号：PCT/KR2007/000082

申请日：2007-01-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KWANGWOON UNIVERSITY RESEARCH INSTITUTE FOR INDUSTRY COOPERATION ,  JEONG, Se-Yoon ,  SEO, Jeong-Il ,  KIM, Kyu-Heon ,  KANG, Kyeongok ,  HONG, Jin-Woo ,  LEE, Yung-Lyul ,  KIM, Dae-Yeon ,  KIM, Dong-Gyun ,  OH, Seoung-Jun ,  SIM, Dong-Gyu ,  AHN, Chang-Beom

Inventor： JEONG, Se-Yoon ,  SEO, Jeong-Il ,  KIM, Kyu-Heon ,  KANG, Kyeongok ,  HONG, Jin-Woo ,  LEE, Yung-Lyul ,  KIM, Dae-Yeon ,  KIM, Dong-Gyun ,  OH, Seoung-Jun ,  SIM, Dong-Gyu ,  AHN, Chang-Beom

IPC: H04N7/24

CPC classification number: H04N19/94 ,  H04N19/107 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61 ,  H04N19/91

Abstract: Video data encoding and decoding methods and apparatuses are provided. In the video data encoding and decoding methods, codes books are provided to an encoder and a decoder. In the encoder, an index corresponding to a vector that is most similar to a current vector of an input moving picture among the vectors of the code book is encoded. In the decoder, the index is decoded. Accordingly, it is possible to increase compression ratio and reduce calculation complexity.

Abstract translation: 提供视频数据编码和解码方法和装置。 在视频数据编码和解码方法中，将码本提供给编码器和解码器。 在编码器中，编码对应于与代码本的向量中的输入运动图像的当前矢量最相似的向量的索引。 在解码器中，索引被解码。 因此，可以增加压缩比并降低计算复杂度。

公开(公告)号：WO2007043793A1

公开(公告)日：2007-04-19

申请号：PCT/KR2006/004073

申请日：2006-10-10

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KYUNGHEE UNIVERSITY ,  PARK, Gwang-Hoon ,  PARK, Min-Woo ,  JEONG, Se-Yoon ,  KIM, Kyu-Heon ,  HONG, Jin-Woo

Inventor： PARK, Gwang-Hoon ,  PARK, Min-Woo ,  JEONG, Se-Yoon ,  KIM, Kyu-Heon ,  HONG, Jin-Woo

IPC: H04N7/24

CPC classification number: H04N21/2383 ,  H04N19/29 ,  H04N19/33 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/61 ,  H04N19/70 ,  H04N19/89 ,  H04N19/895 ,  H04N21/2402 ,  H04N21/2404 ,  H04N21/2662 ,  H04N21/40

Abstract: Since joint scalable video coding (JSVC) adopts a scheme in which numbers are assigned to all of the pictures according to the order in which the pictures are displayed, it is difficult to detect a drop (or loss) of a key picture and thus it is difficult to effectively take action against an error caused by the loss of the key picture. The present invention provides a coding method of detecting a loss of a key picture by numbering key pictures in JSVC in which predictive (P) pictures have a closed-loop structure and of effectively taking action against an error in the case of a loss of a key picture, and a codec using the coding method. The SVC method includes performing encoding while assigning a number to a key picture of an upper layer and performing decoding with respect to the number- encoded current key picture of the upper layer using data of a decoded image of a picture of a lower layer that is temporally matched with the current key picture of the upper layer when a loss of a key picture between the number-encoded current key picture of the upper layer and a previous key picture that is number-encoded prior to the current key picture is detected. Therefore, it is possible to effectively take action against to an error caused by a loss of a key picture by detecting the loss of a key picture during decoding by encoding using numbering of key pictures in JSVC in which closed-loop coding is performed by consecutively predicting key pictures. Moreover, it is possible to minimize degradation in image quality by concealing an error caused by an incorrect reference by using data of a decoded image of a corresponding picture of a lower base layer when a key picture of an upper layer is lost in an environment where transmission of the lower base layer is guaranteed with a video stream having a multi-layered structure.

Abstract translation: 由于联合可缩放视频编码（JSVC）采用根据图像显示顺序将数字分配给所有图像的方案，因此难以检测到关键图像的下降（或丢失），因此它 难以有效地采取行动打击由于失去关键图片而造成的错误。 本发明提供了一种通过对JSVC中的关键画面进行编号来检测关键画面的损失的编码方法，其中预测（P）画面具有闭环结构，并且在丢失了 关键图片和使用编码方法的编解码器。 SVC方法包括在向上层的关键图像分配数字的同时执行编码，并且使用下层的图像的解码图像的数据来执行相对于上层的编号编号的当前关键图像的解码 当检测到在上一层的编号编码的当前关键图像与在当前关键图像之前被编码的先前的关键图像之间的关键图像的丢失时，与上层的当前关键图像暂时匹配。 因此，通过在JSVC中通过编码密钥图像进行编码，通过连续执行闭环编码来检测在解码期间的关键图像的丢失，可以有效地对由于关键图像的丢失引起的错误采取行动 预测关键图片。 此外，当在上层的关键图像丢失的情况下，通过使用下基层的对应图片的解码图像的数据，通过隐藏由不正确参考引起的错误来降低图像质量的劣化， 通过具有多层结构的视频流来保证下基层的传输。