A generation method for acoustic two-dimensional barcode

With rapid development of information technology and upgrading of intelligent terminals, two-dimensional barcode has been widely used as a carrier to store, transfer and retrieve information. Due to the limited capacity, current two-dimensional barcodes are designed to embed text-only messages. In this paper, a generation method for acoustic two-dimensional barcode is proposed. It is based on speech compression, in which low encoding rate is obtained while maintaining high voice quality by introducing MELP compression method. The compressed data stream is then embedded to generate the two-dimensional barcode. In practical applications, the acoustic two-dimensional barcode can be easily scanned by the intelligent terminals installed with decoding software, and then the embedded speech can be decoded and played. When compression rate is equal to 600bps, the embedded speech length can up to 39s. Thus, the application of two-dimensional barcode can be effectively promoted.