深度解析 | 海康威视安防PC强解码之道
<section style="font-size: 15px;line-height: 1.9;letter-spacing: 1.2px;color: rgb(113, 112, 113);box-sizing: border-box;"><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><span style="letter-spacing: 1.2px;">海康威视安防PC-视图终端/Video Station 产品具备</span><strong style="letter-spacing: 1.2px;box-sizing: border-box;"><span style="font-size: 17px;box-sizing: border-box;">强解码</span></strong><span style="letter-spacing: 1.2px;">、</span><strong style="letter-spacing: 1.2px;box-sizing: border-box;"><span style="font-size: 17px;box-sizing: border-box;">高稳定</span></strong><span style="letter-spacing: 1.2px;">、</span><strong style="letter-spacing: 1.2px;box-sizing: border-box;"><span style="font-size: 17px;box-sizing: border-box;">更专业</span></strong><span style="letter-spacing: 1.2px;">三大特性。</span></p></section><section style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;"></section></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br></p><p style="white-space: normal;box-sizing: border-box;">其中强解码主要通过解码算法优化、多显卡调度等技术提升解码路数（支持4K分辨率、支持AR/VR应用、支持鹰眼摄像机等高像素解码），视频播放加载速度快、稳定流畅不卡顿、超高清画质以及时延短，较同类配置产品评测数据显示解码能力提升30%*以上，全面提升客用户操作体验感。</p><p style="white-space: normal;box-sizing: border-box;"><span style="font-size: 12px;box-sizing: border-box;">（*数据来源于海康威视实验室）</span></p><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p><p style="white-space: normal;box-sizing: border-box;">安防PC主要应用于指挥大厅、政务办公、移动办案、显示系统配套、警务站监控、移动办公、店面监控、高性能计算、图像设计等多种场景。</p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><section style="display: flex;flex-flow: row nowrap;margin-top: 10px;margin-bottom: 20px;text-align: center;justify-content: center;box-sizing: border-box;"><section style="display: inline-block;vertical-align: top;width: auto;align-self: flex-start;flex: 0 0 0%;height: auto;box-sizing: border-box;"><section style="box-sizing: border-box;" powered-by="xiumi.us"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;width: 100px;height: auto;box-sizing: border-box;"><img src="https://neice.26x.net/UploadFile/common/wechat//2023/02-19/b59040a7-6fdf-4fe3-9792-b238c76012a0.png" ></section></section></section><section style="display: inline-block;vertical-align: bottom;width: auto;align-self: flex-end;flex: 0 0 auto;min-width: 10%;max-width: 100%;height: auto;margin-bottom: -13px;margin-left: -53px;box-sizing: border-box;"><section style="margin-top: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="text-align: justify;font-size: 17px;color: rgb(255, 207, 85);text-shadow: rgb(255, 255, 255) 0px 1.4px, rgb(255, 255, 255) 1px 1px, rgb(255, 255, 255) 1.4px 0px, rgb(255, 255, 255) 1px -1px, rgb(255, 255, 255) 0px -1.4px, rgb(255, 255, 255) -1px -1px, rgb(255, 255, 255) -1.4px 0px, rgb(255, 255, 255) -1px 1px;letter-spacing: 5px;line-height: 1.5;box-sizing: border-box;"><p style="white-space: normal;box-sizing: border-box;"><strong style="box-sizing: border-box;"><span style="font-size: 30px;box-sizing: border-box;">通关</span><span style="font-size: 23px;box-sizing: border-box;">秘籍一</span></strong></p></section></section><section style="margin-right: 0%;margin-left: 0%;box-sizing: border-box;" powered-by="xiumi.us"><section style="background-color: rgb(255, 207, 85);height: 1px;box-sizing: border-box;"><section><svg viewbox="0 0 1 1" style="float:left;line-height:0;width:0;vertical-align:top;"/></section></section></section><section style="margin-top: 5px;box-sizing: border-box;" powered-by="xiumi.us"><section style="letter-spacing: 2px;color: rgb(62, 62, 62);box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">安防PC解码输出流程</strong></p></section></section></section><section style="display: inline-block;vertical-align: bottom;width: 40px;flex: 0 0 auto;height: auto;align-self: flex-end;margin-bottom: -10px;margin-left: 8px;box-sizing: border-box;"><section style="transform: rotateZ(10deg);-webkit-transform: rotateZ(10deg);-moz-transform: rotateZ(10deg);-o-transform: rotateZ(10deg);box-sizing: border-box;" powered-by="xiumi.us"><section style="box-sizing: border-box;"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;"></section></section></section></section></section></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;"></section></section><section style="margin-top: -2px;box-sizing: border-box;" powered-by="xiumi.us"><section style="font-size: 13px;text-align: center;box-sizing: border-box;"><p style="box-sizing: border-box;"><span style="color: rgb(62, 62, 62);text-decoration-style: solid;text-decoration-color: rgb(62, 62, 62);box-sizing: border-box;">▲<strong style="box-sizing: border-box;">视频解码输出流程</strong></span></p></section></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="display: inline-block;width: 100%;vertical-align: top;background-color: rgba(169, 207, 245, 0.1);padding: 25px;box-sizing: border-box;"><section style="box-sizing: border-box;" powered-by="xiumi.us"><section style="display: flex;flex-flow: row nowrap;text-align: left;justify-content: flex-start;box-sizing: border-box;"><section style="display: inline-block;vertical-align: bottom;width: auto;flex: 0 0 0%;height: auto;align-self: flex-end;margin-right: 4px;box-sizing: border-box;"><section style="transform: perspective(0px);transform-style: flat;box-sizing: border-box;" powered-by="xiumi.us"><section style="text-align: center;transform: rotateX(180deg);box-sizing: border-box;"><section style="display: inline-block;width: 3px;height: 10px;vertical-align: top;overflow: hidden;background-color: rgb(169, 207, 245);box-sizing: border-box;"><section><svg viewbox="0 0 1 1" style="float:left;line-height:0;width:0;vertical-align:top;"/></section></section></section></section></section><section style="display: inline-block;vertical-align: bottom;width: auto;flex: 0 0 0%;height: auto;align-self: flex-end;box-sizing: border-box;"><section style="transform: perspective(0px);transform-style: flat;box-sizing: border-box;" powered-by="xiumi.us"><section style="text-align: center;transform: rotateX(180deg);box-sizing: border-box;"><section style="display: inline-block;width: 3px;height: 16px;vertical-align: top;overflow: hidden;background-color: rgb(169, 207, 245);box-sizing: border-box;"><section><svg viewbox="0 0 1 1" style="float:left;line-height:0;width:0;vertical-align:top;"/></section></section></section></section></section><section style="display: inline-block;vertical-align: bottom;width: auto;border-bottom: 1px solid rgb(169, 207, 245);border-bottom-right-radius: 0px;flex: 0 0 auto;align-self: flex-end;min-width: 10%;max-width: 100%;height: auto;padding: 4px 4px 4px 11px;box-sizing: border-box;"><section style="text-align: justify;box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><strong style="box-sizing: border-box;">安防PC是如何进行解码的呢？</strong></p></section></section></section></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="font-size: 14px;box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;">首先CPU计算好显示内容提交至显卡，显卡将解码的结果存入缓冲区，视频控制器会按照校验信号读取缓冲区的数据，经过数据转换后最终由显示器进行显示。另外，针对视频解码可以交由显卡进行处理，显卡解码后直接进入显存。最终，客用户得到视频、图像、声音等信息的交互。</p></section></section></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><section style="display: flex;flex-flow: row nowrap;margin-top: 10px;margin-bottom: 20px;text-align: center;justify-content: center;box-sizing: border-box;"><section style="display: inline-block;vertical-align: top;width: auto;align-self: flex-start;flex: 0 0 0%;height: auto;box-sizing: border-box;"><section style="box-sizing: border-box;" powered-by="xiumi.us"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;width: 100px;height: auto;box-sizing: border-box;"><img src="https://neice.26x.net/UploadFile/common/wechat//2023/02-19/b59040a7-6fdf-4fe3-9792-b238c76012a0.png" ></section></section></section><section style="display: inline-block;vertical-align: bottom;width: auto;align-self: flex-end;flex: 0 0 auto;min-width: 10%;max-width: 100%;height: auto;margin-bottom: -13px;margin-left: -53px;box-sizing: border-box;"><section style="margin-top: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="text-align: justify;font-size: 17px;color: rgb(255, 207, 85);text-shadow: rgb(255, 255, 255) 0px 1.4px, rgb(255, 255, 255) 1px 1px, rgb(255, 255, 255) 1.4px 0px, rgb(255, 255, 255) 1px -1px, rgb(255, 255, 255) 0px -1.4px, rgb(255, 255, 255) -1px -1px, rgb(255, 255, 255) -1.4px 0px, rgb(255, 255, 255) -1px 1px;letter-spacing: 5px;line-height: 1.5;box-sizing: border-box;"><p style="white-space: normal;box-sizing: border-box;"><strong style="box-sizing: border-box;"><span style="font-size: 30px;box-sizing: border-box;">通关</span><span style="font-size: 23px;box-sizing: border-box;">秘籍二</span></strong></p></section></section><section style="margin-right: 0%;margin-left: 0%;box-sizing: border-box;" powered-by="xiumi.us"><section style="background-color: rgb(255, 207, 85);height: 1px;box-sizing: border-box;"><section><svg viewbox="0 0 1 1" style="float:left;line-height:0;width:0;vertical-align:top;"/></section></section></section><section style="margin-top: 5px;box-sizing: border-box;" powered-by="xiumi.us"><section style="letter-spacing: 2px;color: rgb(62, 62, 62);box-sizing: border-box;"><p style="box-sizing: border-box;"><span style="color: rgb(235, 200, 69);box-sizing: border-box;"><strong style="box-sizing: border-box;">多显</strong></span><span style="color: rgb(235, 200, 69);box-sizing: border-box;"><strong style="box-sizing: border-box;">卡</strong></span><strong style="box-sizing: border-box;">调度，线性叠加，</strong></p><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">多画面同时播放不卡顿</strong></p></section></section></section><section style="display: inline-block;vertical-align: bottom;width: 40px;flex: 0 0 auto;height: auto;align-self: flex-end;margin-bottom: -10px;margin-left: 8px;box-sizing: border-box;"><section style="transform: rotateZ(10deg);-webkit-transform: rotateZ(10deg);-moz-transform: rotateZ(10deg);-o-transform: rotateZ(10deg);box-sizing: border-box;" powered-by="xiumi.us"><section style="box-sizing: border-box;"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;"></section></section></section></section></section></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="transform-origin: center center 0px;box-sizing: border-box;" powered-by="xiumi.us"><section style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;width: 80%;height: auto;box-sizing: border-box;"></section></section></section><section style="font-size: 13px;text-align: center;box-sizing: border-box;" powered-by="xiumi.us"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;"><span style="color: rgb(62, 62, 62);text-indent: 32px;text-decoration-style: solid;text-decoration-color: rgb(62, 62, 62);box-sizing: border-box;">▲双独显解码过程</span></strong></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p><p style="white-space: normal;box-sizing: border-box;">安防PC支持多显卡调度，解码性能线性叠加。在双独显解码过程如上图，采用DMA（Direct Memory Access ）方式，CPU较少参与，主要是两张显卡显存之间通过PCIe总线拷贝数据的一个过程。</p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;"></section></section><section style="text-align: center;box-sizing: border-box;" powered-by="xiumi.us"><p style="box-sizing: border-box;"><span style="font-size: 13px;color: rgba(62, 62, 62, 0.94);box-sizing: border-box;"><span style="box-sizing: border-box;">▲</span><strong style="box-sizing: border-box;">集显+独显的解码过程</strong></span><br style="box-sizing: border-box;"></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br></p><p style="white-space: normal;box-sizing: border-box;">在集显+独显的解码过程如上图，此核显是没有像独显那样的显存的，它主要使用的是操作系统在主内存上给其分配的一段共享内存，此段内存核显卡具有优先使用权。</p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;"></section></section><section style="font-size: 13px;text-align: center;box-sizing: border-box;" powered-by="xiumi.us"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;"><span style="color: rgb(62, 62, 62);text-decoration-style: solid;text-decoration-color: rgb(62, 62, 62);box-sizing: border-box;">▲多显卡调度、性能线性叠加过程</span></strong></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p><p style="white-space: normal;box-sizing: border-box;">海康威视安防PC多显卡调度，是通过海康威视安防PC客户端调用显卡管理组件，进行视频的解码和渲染输出。将多种显卡的解码能力，线性叠加，提升解码路数。同时可以根据客用户业务量进行负载均衡，将各显卡渲染后的画面进行整合，最终呈现出多屏幕分别显示不同画面或一机多屏显示不同画面，视频播放流畅不卡顿。<br style="box-sizing: border-box;"></p><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p><p style="white-space: normal;box-sizing: border-box;">海康威视安防PC，结合多年在视频编解码技术上的技术积淀和经验积累，在全栈硬件平台上，集成自研解码算法和多显卡调度组件，大大提升集显、独显的解码性能。同时，使用软硬协同解码，从系统层、驱动层、传输层、显示层等方面层层优化，以客用户体验为最终目的，提高视频音频提取质量。</p><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p><p style="white-space: normal;box-sizing: border-box;">未来，海康威视安防PC将持续深耕解码核心技术，为安防PC发展提供不竭动力。</p><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><section style="display: flex;flex-flow: row nowrap;margin-top: 10px;margin-bottom: -14px;box-sizing: border-box;"><section style="display: inline-block;vertical-align: bottom;width: auto;align-self: flex-end;flex: 0 0 0%;height: auto;box-sizing: border-box;"><section style="text-align: center;box-sizing: border-box;" powered-by="xiumi.us"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;width: 100px;height: auto;box-sizing: border-box;"><img src="https://neice.26x.net/UploadFile/common/wechat//2023/02-19/b59040a7-6fdf-4fe3-9792-b238c76012a0.png" ></section></section></section><section style="display: inline-block;vertical-align: bottom;width: auto;align-self: flex-end;flex: 100 100 0%;height: auto;margin-left: -53px;box-sizing: border-box;"><section style="margin: 10px 0%;box-sizing: border-box;" powered-by="xiumi.us"><section style="font-size: 28px;color: rgb(255, 207, 85);text-shadow: rgb(255, 255, 255) 0px 1.4px, rgb(255, 255, 255) 1px 1px, rgb(255, 255, 255) 1.4px 0px, rgb(255, 255, 255) 1px -1px, rgb(255, 255, 255) 0px -1.4px, rgb(255, 255, 255) -1px -1px, rgb(255, 255, 255) -1.4px 0px, rgb(255, 255, 255) -1px 1px;letter-spacing: 5px;line-height: 1.8;box-sizing: border-box;"><p style="white-space: normal;box-sizing: border-box;"><span style="box-sizing: border-box;"><strong style="box-sizing: border-box;">解码科普小知识</strong></span></p></section></section></section><section style="display: inline-block;vertical-align: bottom;width: 50px;flex: 0 0 auto;height: auto;align-self: flex-end;box-sizing: border-box;"><section style="transform: rotateZ(10deg);-webkit-transform: rotateZ(10deg);-moz-transform: rotateZ(10deg);-o-transform: rotateZ(10deg);box-sizing: border-box;" powered-by="xiumi.us"><section style="text-align: center;box-sizing: border-box;"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;"></section></section></section></section></section></section><section style="text-align: center;justify-content: center;margin-bottom: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="display: inline-block;width: 95%;vertical-align: top;border-width: 0px;border-radius: 10px;border-style: none;border-color: rgb(62, 62, 62);overflow: hidden;background-color: rgb(255, 251, 240);padding: 25px;height: auto;box-sizing: border-box;"><section style="box-sizing: border-box;" powered-by="xiumi.us"><section style="justify-content: center;margin-bottom: 20px;display: flex;flex-flow: row nowrap;box-sizing: border-box;"><section style="display: inline-block;width: 100%;vertical-align: top;flex: 0 0 auto;height: auto;line-height: 0;align-self: flex-start;box-sizing: border-box;"><section style="margin-right: 0%;margin-left: 0%;box-sizing: border-box;" powered-by="xiumi.us"><section style="background-color: rgb(255, 207, 85);height: 1px;box-sizing: border-box;"><section><svg viewbox="0 0 1 1" style="float:left;line-height:0;width:0;vertical-align:top;"/></section></section></section></section></section></section><section style="text-align: left;justify-content: flex-start;margin-top: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="display: inline-block;width: auto;vertical-align: top;border-left: 5px solid rgb(255, 207, 85);border-bottom-left-radius: 0px;padding-left: 9px;min-width: 10%;max-width: 100%;height: auto;box-sizing: border-box;"><section style="margin: 2px 0%;box-sizing: border-box;" powered-by="xiumi.us"><section style="color: rgb(255, 207, 85);line-height: 1.3;box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="letter-spacing: 1.2px;box-sizing: border-box;">解码主要的三个基础参数</strong></p></section></section></section></section><section style="text-align: justify;box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><span style="font-size: 14px;box-sizing: border-box;"><strong style="box-sizing: border-box;">帧率</strong>：FPS（每秒钟要多少帧画面），通常为25帧。</span></p><p style="white-space: normal;box-sizing: border-box;"><span style="font-size: 14px;box-sizing: border-box;"><strong style="box-sizing: border-box;">码率</strong>：编码器每秒编出的数据大小，单位是kbps。</span></p><p style="white-space: normal;box-sizing: border-box;"><span style="font-size: 14px;box-sizing: border-box;"><strong style="box-sizing: border-box;">分辨率</strong>：单位英寸中所包含的像素点数。</span></p></section><section style="text-align: left;justify-content: flex-start;margin-top: 15px;margin-bottom: 5px;box-sizing: border-box;" powered-by="xiumi.us"><section style="display: inline-block;width: auto;vertical-align: top;border-left: 5px solid rgb(255, 207, 85);border-bottom-left-radius: 0px;padding-left: 9px;min-width: 10%;max-width: 100%;height: auto;box-sizing: border-box;"><section style="margin: 2px 0%;box-sizing: border-box;" powered-by="xiumi.us"><section style="color: rgb(255, 207, 85);line-height: 1.3;box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="letter-spacing: 1.2px;box-sizing: border-box;">三者对应播放质量的关系</strong></p></section></section></section></section><section style="margin-top: -5px;box-sizing: border-box;" powered-by="xiumi.us"><section style="text-align: justify;box-sizing: border-box;"><p style="white-space: normal;box-sizing: border-box;"><span style="font-size: 14px;box-sizing: border-box;">①<strong style="box-sizing: border-box;">帧率影响画面流畅度，与画面流畅度成正比。</strong>帧率越大，画面越流畅；帧率越小，画面越有跳动感。如果码率为变量，则帧率也会影响体积，帧率越高，每秒钟经过的画面越多，需要的码率也越高，体积也越大。</span></p><p style="white-space: normal;box-sizing: border-box;"><span style="font-size: 14px;box-sizing: border-box;">②<strong style="box-sizing: border-box;">图像大小与分辨率成正比，分辨率越高</strong>，图像越大；分辨率越低，图像越小。</span></p><p style="white-space: normal;box-sizing: border-box;"><span style="font-size: 14px;box-sizing: border-box;">③<strong style="box-sizing: border-box;">清晰度与码率、分辨率的关系</strong></span></p><p style="white-space: normal;box-sizing: border-box;"><span style="font-size: 14px;box-sizing: border-box;">在码率一定的情况下，清晰度与分辨率成反比关系，分辨率越高，图像越不清晰；分辨率越低，图像越清晰。</span></p><p style="white-space: normal;box-sizing: border-box;"><span style="font-size: 14px;box-sizing: border-box;">在分辨率一定的情况下，码率与清晰度成正比关系，码率越高，图像越清晰；码率越低，图像越不清晰。</span></p></section></section></section></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section><section style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="max-width: 100%;vertical-align: middle;display: inline-block;line-height: 0;box-sizing: border-box;"></section></section><section style="box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;"><br 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