Abstract in simplified Chinese:一种云端交互服务系统及其运作方法,透过一网络主机利用一声音浮水印将复数个设备进行链接并设立群组的方法,其运作流程包括:连接至少一多媒体设备与该网络主机,该网络主机发送该声音浮水印给该至少一多媒体设备,该声音浮水印可包含一认证信息,该至少一多媒体设备播放该声音浮水印,至少一电子设备接收该声音浮水印后再发送该声音浮水印或该声音浮水印包含之该认证信息给该网络主机,该网络主机对该声音浮水印或该认证信息进行确认,接着该网络主机将该至少一多媒体设备及该至少一电子设备设立为一特定群组,该网络主机再发送不同的数据给该特定群组。
Abstract:
PROBLEM TO BE SOLVED: To provide methods, an apparatus, and articles of manufacture to perform audio watermark decoding.SOLUTION: A disclosed example method includes receiving an audio signal including an audience measurement code embedded therein using a first plurality of frequency components, sampling the audio signal, transforming the sampled audio signal into a first frequency domain representation, determining whether the code is detectable in the first plurality of frequency components of the first frequency domain representation, and when the code is not detected in the first plurality of frequency components, examining a second plurality of frequency components of a second frequency domain representation to determine whether the code is detected. The second plurality of frequency components are offset from the first plurality of frequency components by a first offset corresponding to a sampling frequency mismatch.
Abstract:
PROBLEM TO BE SOLVED: To provide a method that enables the transmission of a digital message along with a corresponding information signal, such as audio or video. SOLUTION: A telecommunications device that is processing an information signal from its user, such as a speech signal, encrypts the information signal by performing a bitwise exclusive-or of an encryption key stream with the information signal stream. The device, such as a telecommunications endpoint, then intersperses the bits of the digital message throughout the encrypted signal in place of those bits overwritten, in a process referred to as "watermarking". The endpoint then transmits the interspersed digital message bits as part of a composite signal that also comprises the encrypted information bits. No additional bits are appended to the packet to be transmitted, thereby addressing compatibility issues. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
Systems and methods are provided for decoding a message symbol in an audio signal. This message symbol is represented by first and second code symbols displaced in time. Values representing the code signals are accumulated and the accumulated values are examined to detect the message symbol.
Abstract:
The present invention relates to techniques for authentication of data streams. Specifically, the invention relates to the insertion of identifiers into a data stream, such as a Dolby Pulse, AAC or HE AAC bitstream, and the authentication and verification of the data stream based on such identifiers. A method and system for encoding a data stream comprising a plurality of data frames is described. The method comprises the step of generating a cryptographic value of a number N of successive data frames and configuration information, wherein the configuration information comprises information for rendering the data stream. The method then inserts the cryptographic value into the data stream subsequent to the N successive data frames.