{
  "name": "视听底图",
  "name_en": "AV ATLAS OF CHINA",
  "description": "中国视听产业的公开底图。不做交易、不做担保、不卖排名。",
  "license": "CC BY 4.0",
  "updated": "2026-09-20",
  "canonical": "https://avnj.com.cn",
  "contact": "bd@avnj.com.cn",
  "count": 28,
  "items": [
    {
      "category": "led",
      "code": "led.pixel_pitch",
      "label": "点间距",
      "unit": "mm",
      "data_type": "number",
      "enum_values": null,
      "better": "smaller",
      "is_key": true,
      "definition": "相邻像素中心距。决定同等观看距离下的细腻度，是整个 LED 显示选型的第一参数"
    },
    {
      "category": "led",
      "code": "led.encapsulation",
      "label": "封装工艺",
      "unit": null,
      "data_type": "enum",
      "enum_values": [
        "SMD",
        "COB",
        "GOB",
        "MIP"
      ],
      "better": null,
      "is_key": true,
      "definition": "像素的封装方式。直接决定防护等级、可靠性与可维护性"
    },
    {
      "category": "led",
      "code": "led.brightness",
      "label": "亮度",
      "unit": "cd/m²",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": true,
      "definition": "单位面积发光强度。室内与半户外/户外场景的要求差异极大"
    },
    {
      "category": "led",
      "code": "led.refresh_rate",
      "label": "刷新率",
      "unit": "Hz",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": true,
      "definition": "每秒画面重绘次数。低于摄像机快门要求时拍摄会出现扫描线"
    },
    {
      "category": "led",
      "code": "led.gray_level",
      "label": "灰度等级",
      "unit": "bit",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": false,
      "definition": "单色通道的灰阶位数，影响暗部层次"
    },
    {
      "category": "led",
      "code": "led.color_gamut",
      "label": "色域",
      "unit": "%NTSC",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": false,
      "definition": "可显示色彩范围，广电与影视场景为关键指标"
    },
    {
      "category": "led",
      "code": "led.contrast",
      "label": "对比度",
      "unit": ":1",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": false,
      "definition": "最亮与最暗的比值，常以标称值给出，需注明测试条件"
    },
    {
      "category": "led",
      "code": "led.viewing_angle",
      "label": "可视角度",
      "unit": "°",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": false,
      "definition": "亮度衰减到 50% 时的观察角度，常以水平/垂直分别给出"
    },
    {
      "category": "led",
      "code": "led.cabinet_size",
      "label": "箱体尺寸",
      "unit": "mm",
      "data_type": "string",
      "enum_values": null,
      "better": "none",
      "is_key": false,
      "definition": "单个箱体的宽×高×厚，决定拼接灵活性与运输方案"
    },
    {
      "category": "led",
      "code": "led.weight",
      "label": "箱体重量",
      "unit": "kg",
      "data_type": "number",
      "enum_values": null,
      "better": "smaller",
      "is_key": false,
      "definition": "单箱体重量，影响钢结构载荷与安装人力成本"
    },
    {
      "category": "led",
      "code": "led.power_consumption",
      "label": "平均功耗",
      "unit": "W/m²",
      "data_type": "number",
      "enum_values": null,
      "better": "smaller",
      "is_key": true,
      "definition": "平均工况下的单位面积功耗，直接影响长期电费与配电容量"
    },
    {
      "category": "led",
      "code": "led.maintenance",
      "label": "维护方式",
      "unit": null,
      "data_type": "enum",
      "enum_values": [
        "前维护",
        "后维护",
        "前后维护"
      ],
      "better": null,
      "is_key": false,
      "definition": "是否需要在屏体背后预留检修通道，对空间规划有硬影响"
    },
    {
      "category": "led",
      "code": "led.localization",
      "label": "国产化程度",
      "unit": null,
      "data_type": "enum",
      "enum_values": [
        "全国产",
        "部分国产",
        "进口为主"
      ],
      "better": "bigger",
      "is_key": true,
      "definition": "关键器件（驱动 IC、控制系统、灯珠）的国产化比例，信创与政府采购场景的准入项"
    },
    {
      "category": "led",
      "code": "led.warranty",
      "label": "质保年限",
      "unit": "年",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": false,
      "definition": "厂商承诺的整屏质保年限"
    },
    {
      "category": "led",
      "code": "led.certification",
      "label": "认证情况",
      "unit": null,
      "data_type": "string",
      "enum_values": null,
      "better": "none",
      "is_key": true,
      "definition": "已通过的 CCC、节能、CE、RoHS 等认证清单"
    },
    {
      "category": "conf",
      "code": "conf.room_size",
      "label": "适用会议室规模",
      "unit": "人",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": true,
      "definition": "设备设计支持的参会人数上限，是会议系统选型的第一参数"
    },
    {
      "category": "conf",
      "code": "conf.latency",
      "label": "画面同步延迟",
      "unit": "ms",
      "data_type": "number",
      "enum_values": null,
      "better": "smaller",
      "is_key": true,
      "definition": "端到端编码、传输、解码的总延迟。影响远程会议的对话节奏"
    },
    {
      "category": "conf",
      "code": "conf.resolution",
      "label": "视频分辨率",
      "unit": null,
      "data_type": "enum",
      "enum_values": [
        "1080P",
        "4K",
        "8K",
        "其他"
      ],
      "better": null,
      "is_key": true,
      "definition": "单路视频的最高输出分辨率"
    },
    {
      "category": "conf",
      "code": "conf.audio_protocol",
      "label": "音频协议",
      "unit": null,
      "data_type": "enum",
      "enum_values": [
        "Dante",
        "AES67",
        "AVB",
        "自有协议",
        "无"
      ],
      "better": null,
      "is_key": true,
      "definition": "音频传输所采用的协议。决定与第三方音频系统的互通能力"
    },
    {
      "category": "conf",
      "code": "conf.audio_pickup_range",
      "label": "拾音半径",
      "unit": "m",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": true,
      "definition": "单支麦克风的可靠拾音距离，决定会议室需要的麦克风数量"
    },
    {
      "category": "conf",
      "code": "conf.mic_count",
      "label": "麦克风数量",
      "unit": "个",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": false,
      "definition": "系统标准配置所含的麦克风数量"
    },
    {
      "category": "conf",
      "code": "conf.echo_cancellation",
      "label": "回声消除",
      "unit": null,
      "data_type": "enum",
      "enum_values": [
        "是",
        "否"
      ],
      "better": "bigger",
      "is_key": false,
      "definition": "是否具备 AEC 回声消除能力"
    },
    {
      "category": "conf",
      "code": "conf.simultaneous_interpretation",
      "label": "同传通道数",
      "unit": "通道",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": false,
      "definition": "支持的同声传译通道数量，国际会议与涉外场景的关键项"
    },
    {
      "category": "conf",
      "code": "conf.software_dependency",
      "label": "是否依赖第三方软件授权",
      "unit": null,
      "data_type": "enum",
      "enum_values": [
        "是",
        "否",
        "部分"
      ],
      "better": "smaller",
      "is_key": true,
      "definition": "使用是否必须购买第三方软件许可。此项直接影响总拥有成本，但极少被厂商主动披露"
    },
    {
      "category": "conf",
      "code": "conf.api_openness",
      "label": "第三方集成开放性",
      "unit": null,
      "data_type": "enum",
      "enum_values": [
        "开放API",
        "仅SDK",
        "无"
      ],
      "better": "bigger",
      "is_key": true,
      "definition": "是否提供开放 API 供第三方平台调用。决定能否被集成进甲方的统一管理平台"
    },
    {
      "category": "conf",
      "code": "conf.localization",
      "label": "国产化程度",
      "unit": null,
      "data_type": "enum",
      "enum_values": [
        "全国产",
        "部分国产",
        "进口为主"
      ],
      "better": "bigger",
      "is_key": true,
      "definition": "核心芯片与软件的国产化比例，信创场景准入项"
    },
    {
      "category": "conf",
      "code": "conf.control_protocol",
      "label": "控制协议",
      "unit": null,
      "data_type": "string",
      "enum_values": null,
      "better": "none",
      "is_key": false,
      "definition": "支持的中控控制协议与接口类型"
    },
    {
      "category": "conf",
      "code": "conf.warranty",
      "label": "质保年限",
      "unit": "年",
      "data_type": "number",
      "enum_values": null,
      "better": "bigger",
      "is_key": false,
      "definition": "厂商承诺的系统质保年限"
    }
  ]
}