Determination of the presence of additional coded data in a data frame
November 2, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesEncoding method and apparatus for recording data with an identification code and an error check code Ancillary data processing circuit for audio decoding system Device and method for extracting a bit field from a stream of data Digital signal reproduction apparatus Early error detection within an MPEG decoder Multichannel digital audio decoding method and apparatus MPEG coded picture decoding apparatus System and method for concealing errors in an audio transmission System for detecting start codes in MPEG video streams and method of operating the same Patent #: 6963612 InventorAssigneeApplicationNo. 10495838 filed on 11/02/2002US Classes:714/750, Feedback to transmitter for comparison714/776, For packet or frame multiplexed data714/775, Synchronization714/758, Error correcting code with additional error detection code (e.g., cyclic redundancy character, parity)370/503, Synchronizing712/300, BYTE-WORD REARRANGING, BIT-FIELD INSERTION OR EXTRACTION, STRING LENGTH DETECTING, OR SEQUENCE DETECTING714/764, Error correct and restore375/240.12, Predictive700/94, Digital audio data processing system375/240.27, Error detection or correction375/240.25, Specific decompression process704/200.1PsychoacousticExaminersPrimary: Lamarre, GuyAssistant: Rizk, Sam Attorney, Agent or FirmForeign Patent References
International ClassH04L 1/14AbstractAn mp3-standard bitstream is formatted into a sequence of fixed-length data frames. These include headers, side information, main information and a remaining data field without generally defined information denoted as ‘ancillary data’. The mp3PRO format is an extension of the mp3 format, wherein the additional mp3PRO data are transferred in the ancillary data fields. In various applications, e.g. Internet music search machines, a necessity arises for a fast determination of the bitstream types. Such determination is normally executed using an mp3PRO decoder. However, because the frame header does not contain a corresponding pointer to the start address of the ancillary data field, an mp3PRO decoder must first completely decode at least one data frame according to the mp3 standard in order to find the end address of the mp3 data and thereby the following start address of the mp3PRO data in that data frame. Thereafter the mp3PRO decoder must examine the data following in the data stream for characteristics that are typical for mp3PRO additional information. The invention discloses how the bitstream type can be determined without using mp3 decoding and without using an mp3PRO decoder.Other References
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