METHODS AND APPARATUS FOR MIXING COMPRESSED DIGITAL BIT STREAMS

• US 20130194507A1
• Filed: 03/13/2013
• Published: 08/01/2013
• Est. Priority Date: 07/02/2004
• Status: Active Grant

• Current Assignee: The Nielsen Company LLC (MOOD Media Corporation)
• Original Assignee: The Nielsen Company LLC (MOOD Media Corporation)
• Inventors: Peiffer, John C., Srinivasan, Venugopal
• Granted Patent: US 9,191,581 B2
• Time in Patent Office: Days
• US Class Current: 348/660
• CPC Class Codes: G10L 19/008 Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
• CPC Class Codes: G10L 19/032 Quantisation or dequantisation of spectral components
• CPC Class Codes: G10L 19/173 Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 2020/00028 Advanced audio coding [AAC]
• CPC Class Codes: G11B 2020/00036 AC-3, i.e. ATSC digital audio compression standard
• CPC Class Codes: G11B 2020/10546 specifically adapted for audio data
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: H04N 5/265 Mixing

Abstract

Methods, apparatus and articles of manufacture for mixing compressed digital bit streams are disclosed. An example method disclosed herein comprises acquiring a frame associated with a first compressed digital bit stream, unpacking the frame to obtain a plurality of original transform coefficient sets, and modifying the plurality of original transform coefficient sets to mix a second digital bit stream with the first compressed digital bit stream.

Claims

1. A method of mixing a first compressed digital bit stream with a second digital bit stream, the method comprising:

acquiring a frame associated with the first compressed digital bit stream;

unpacking the frame to obtain a plurality of original transform coefficient sets; and

modifying the plurality of original transform coefficient sets to mix the second digital bit stream with the first compressed digital bit stream.