Audio data hiding that is suitable for aerial transmission

将数字数据嵌入音乐或语音信号的技术被开发出来。从扬声器中复制嵌入信号，并由麦克风接收以提取嵌入数据。为了检验该技术的有效性和实用性，根据混响和噪声空间中的数据传输速率和音质退化对该系统进行了评估。结果表明，嵌入数据的语音和音乐信号的音质退化并不严重。此外，嵌入的数据通过手机编码的语音信号成功传输。

Technology that embeds digital data into musical or speech signals inaudibly was developed. The embedded signals were reproduced from loudspeakers and were received by a microphone to extract the embedded data. In order to examine effectiveness and usefulness of the technology, the system was evaluated in terms of data transmission rate and sound quality degradation in reverberant and noisy space. The results showed that sound quality degradation of speech and musical signals that were embedded data was not so severe. In addition, embedded data were successfully transmitted via speech signals encoded by the cellular phone.