MPEG-4: A 15-minute Presentation.


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Improved feature coding. Premise for coding arrangement of DVD, Digital Television and telecast ... Application Engine (BIFS) MUMT-611: Music Information Acquisition, ...
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MPEG-4: A 15-minute Introduction Denis Lebel exhibited by

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Presentation Outline Introduction MPEG-4 Overview MPEG-4 Audio Advanced Audio Coding (AAC) Conclusion References + Links MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Introduction What is MPEG-4? A standard for interactive media content conveyance Introduced in late 1998 Developed by the Moving Picture Experts Group (MPEG) Goes past 2D video and sound Provides an institutionalized system for different media MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Introduction A tiny bit of history… MPEG-1: (1991) 3 Layers of sound coding multifaceted nature (MP3 = MPEG-1 Layer 3) Up to 2 sound stations Video coding for Video-CD Standard made out of 5 sections MPEG-2: (1994) Advanced Audio Coding (AAC) Up to 5.1 sound stations Enhanced video coding Basis for coding arrangement of DVD, Digital Television and communicate Standard made out of 10 sections MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Introduction A smidgen of history… MPEG-3: (N/A) Not MP3! Initially implied for HDTV Not discharged since HDTV prerequisites effectively show in MPEG-2 MPEG-4: (late 1998) Some applications: Web media gushing, CD dispersion, Videophone, communicate TV Emphasis is on higher usefulness instead of better pressure effectiveness Standard made out of 22 sections MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Presentation Outline Introduction MPEG-4 Overview MPEG-4 Audio Advanced Audio Coding (AAC) Conclusion References + Links MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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MPEG-4 Overview MPEG-4 Standard Meant to wind up the all inclusive dialect between communicating, motion picture and interactive media applications Provides institutionalized methods for speaking to the different components of sight and sound substance (e.g., sound, video, … ) Allows for licensed innovation administration and insurance MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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MPEG-4 Overview MPEG-4 Model Describes the mixed media content in an article situated way Media components are protests part of a scene Media items can be regular or manufactured Objects can be encoded and transmitted independently in their own stream Composition of the scene happens after transmission and translating In MPEG-2, sythesis happens before encoding MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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MPEG-4 Overview MPEG-4 Model MPEG-4 comprises of substantial number of instruments gathered in profiles An application may utilize an arrangement of profiles taking into account the functionalities required Profiles exist at various levels of multifaceted nature MPEG-4 comprises of firmly interrelated yet unmistakable individual parts MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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MPEG-4 Overview MPEG-4 Parts Part 1: Systems Part 2: Visual Part 3: Audio Part 4: Conformance Part 5: Reference Software Part 6: Delivery Multimedia Integration Framework (DMIF) Part 7: Optimized Reference Software Part 8: Carriage over IP Networks Part 9: Reference Hardware Part 10: Advanced Video Coding Part 11: Scene Description and Application Engine (BIFS) MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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MPEG-4 Overview MPEG-4 Parts Part 12: ISO Based Media File Format Part 13: Intellectual Property Management and Protection (IPMP) Part 14: MPEG-4 File Format Part 15: AVC File Format Part 16: Animation Framework eXtension (AFX) Part 17: Timed Text Subtitle Format Part 18: Font Compression and Streaming Part 19: Synthesized Texture Stream Part 20: Lightweight Scene Representation (LASeR) Part 21: MPEG-J Graphical Framework eXtension (GFX) Part 22: Open Font Format Specification (OFFS) MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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MPEG-4 Overview MPEG-4 Applications Broadcasting Collaborative Scene Visualization "Content-based" Storage and Retrieval Digital Television DVD Mobile Multimedia Real-Time Communications Web Streaming (video, sound, … ) Studio Post-Production Virtual Meeting … MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Presentation Outline Introduction MPEG-4 Overview MPEG-4 Audio Advanced Audio Coding (AAC) Conclusion References + Links MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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MPEG-4 Audio Description A group of sound coding calculations Spans an extremely expansive scope of bit rates Uses Advanced Audio Coding (AAC) to encode the sound sign MPEG-4 is a compartment record: Song title Album spread … Audio Digital Rights Management (DRM) can be connected MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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MPEG-4 Audio File Extension MP4: Can be any MPEG-4 document (e.g., video, sound, … ) Does not as a matter of course contain MPEG-4 sound MA4: Stands for MPEG 4 Audio M4P: MPEG 4 Audio records that are ensured (utilizing DRM) Used by iTunes Music Store AAC: Audio documents that are not contained in a MPEG-4 holder record Some product bolster M4A, others support MP4 Really just a document augmentation MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Advanced Audio Coding Some Improvements over MPEG-1 Audio: Sampling Frequencies: 8 - 96Hz (official MP3: 16 - 48Hz) Up to 48 Channels (up to 2 stations) Higher productivity and less complex filterbank (unadulterated MDCT) (half and half change) Higher coding proficiency for stationary signs (bigger piece size) Higher coding proficiency for transient signs (littler square size) Better treatment of high frequencies (i.e. > 16kHz) More adaptable joint stereo MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Advanced Audio Coding Some new elements presented in AAC Pure Modified Discrete Cosine Transform (MDCT) Longer/Shorter windows Ability to flip M/S stereo or force stereo on a subband premise Temporal Noise molding (TNS) Perceptual Noise Substitution (PNS) Long Term Prediction (LTP) for stationary signs MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Presentation Outline Introduction MPEG-4 Overview MPEG-4 Audio Advanced Audio Coding (AAC) Conclusion References + Links MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Conclusion MPEG-4 gives an expansive structure to effective conveyance of wealthier mixed media content MPEG-4 Audio highlights better stable quality in contrast with MPEG-1 because of its Advanced Audio Coding (AAC) MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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References Brandenburg, K. 1999. MP3 and ACC clarified. Procedures of the Audio Engineering Society Conference on High Quality Audio Coding . Pereira, F., and T. Ebrahimi. 2002. The MPEG-4 book . Upper Saddle River, NJ: Prentice-Hall. Worldwide Organization for Standardization. 2002. Diagram of the MPEG-4 standard, V.21 (Jeju Version) . Worldwide Organization for Standardization. 1999. MPEG-4 applications . Universal Organization for Standardization. 2003. MPEG-4 necessities, V.18 (Trondheim correction) . MPEG-4 Industry Forum. 2002. MPEG-4: The media standard . MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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Links http://www.chiariglione.org/mpeg/http://www.m4a.com/http://www.m4if.org/http://www.mpeg.org/http://wikipedia.org/MUMT-611: Music Information Acquisition, Preservation, and Retrieval

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