目前市场上的主流DVR产品是PC架构的。虽然大家都在卖DVR,但是几百家企业中,没有任何企业具备压缩算法的研发和芯片生产能力。压缩芯片全部依赖进口,比较常见的品牌是飞利浦和德州仪器。其实,据记者了解,市场上的芯片有不少是美国加州硅谷一些不知名的小公司做的,只不过贴了别人的牌子。在压缩芯片的基础上生产的视音频压缩板卡,是DVR的核心组成部分,负责整台设备的操作和运算,特别是视音频信号的处理,对于DVR产品的性能起决定性作用。国内具备视音频压缩板卡的研发和生产能力的企业不会超过10家,主要有杭州海康、成都德加拉、武汉恒亿、深圳图敏等。我们可以称他们为拥有核心研发能力的企业,处于市场的第一阶层。在视音频压缩板卡的基础上,少部分企业可以进行二次开发,设计出各具特色的应用软件,集成相关硬件后生产出DVR整机。这些厂商具备一定的资金和技术实力,可以为不同用户提供客户化定制服务,是目 The current mainstream DVR products on the market are PC architectures. Although everyone is selling DVRs, none of the hundreds of enterprises have the R & D and chip manufacturing capabilities of compression algorithms. Compression chips all rely on imports, the more common brands are Philips and Texas Instruments. In fact, according to the reporter, many chips on the market are some unknown small companies in Silicon Valley, California, just posted other people’s brands. The video and audio compression card produced on the basis of the compression chip is the core component of the DVR and is responsible for the operation and operation of the entire device, especially the processing of video and audio signals, which plays a decisive role in the performance of DVR products. Domestic video and audio compression board R & D and production capacity of enterprises will not exceed 10, mainly in Hangzhou Hankook, Chengdu, Degura, Wuhan billion constant, such as Shenzhen TU Min. We can call them the first tier of the market for companies that have the core R & D capabilities. On the basis of video and audio compression card, a small number of enterprises can carry out secondary development to design unique application software and integrate the relevant hardware to produce DVR machine. These vendors have a certain amount of financial and technical strength, can provide customized services for different users, is the head