Audio fingerprint for content identification

摘要

Methods and system for identifying multimedia content streaming through a television includes retrieving an audio signal from a multimedia content selected for rendering at the television. The retrieved audio signal is partitioned into a plurality of segments of small intervals. A particular segment is analyzed to identify acoustic modulation and to generate a distinct vector for the particular segment based on the acoustic modulation, wherein the vector defines a unique fingerprint of the particular segment of the audio signal. A content database on a server is queried using the vector of the particular segment to obtain content information for multimedia content that matches the fingerprint of the particular segment. The content information is used to identify the multimedia content and the source of the multimedia content that matches the audio signal received for rendering.

主权项

1. A method for identifying multimedia content streaming to a television, the method executed by a processor, comprising:
retrieving an audio signal for multimedia content selected for rendering at the television; partitioning the audio signal into a plurality of segments; analyzing a particular segment to identify acoustic modulations in the particular segment, the analysis generating a vector for the particular segment based on the acoustic modulation, the vector defining an unique audio fingerprint of the particular segment of the audio signal, wherein the vector identifies a plurality of floating point numbers of data points representing the unique audio fingerprint; and querying a content database on a server using the vector of the particular segment of audio signal to identify information data for the multimedia content, the content database including a plurality of pre-computed data points and each pre-computed data point is associated with information data for different multimedia content including the multimedia content rendered, wherein the information data is identified by finding a substantial match of the vector to data points in the content database, the querying causing the identified information data to be retrieved and stored in a local cache for local verification that the selected multimedia content remains selected, the retrieved and stored information data being valid for an upcoming additional amount of time.