摘要
针对目前市场上机顶盒调查仪设计复杂、成本高、价格昂贵,提出了基于DSP的收视率调查仪设计,通过将电视语音信号与多媒体高频头所得到的伴音信号进行A/D采样、FIR滤波、FFT运算和频谱比较,将最终运算结果发送到上一级的子处理系统进行数据统计,得出各栏目的收视率。该设计与传统机顶盒调查仪相比,具有设备简单、成本低、实时性好和准确性高等特点。
Because the current Set Top Boxs （STB） on the market are designed complexity, expensively and with high cost, a DSP-based instrument ratings survey design is presented in this paper. The voice signal through the TV and sound signal received from multimedia tuner are A/D sampled, FIR fiherred, FFT spectrum calculated and compeared, and the final results will be sent to a upper grade subset of the data processing system, in order to obtain ratings of each column. By comparing with the traditional STB, the designed device has simple equipment, low cost, real-time and high accuracy.
出处
《电视技术》
北大核心
2009年第7期30-33,共4页
Video Engineering
