White paper Sony Ericsson P1

DLS

The DLS file format is used to store both the digital sound data and articulation

 

parameters needed to create one or more 'instruments.' An instrument contains

 

'regions' which point to WAVE 'files' (samples) also embedded in the DLS file. Each

 

region specifies a MIDI note and velocity range which will trigger the corresponding

 

sound and also contains articulation information such as envelopes and loop points.

 

Articulation information can be specified for each individual region or for the entire

 

instrument.”

 

 

Real Audio 9

RealAudio is a proprietary encoding format from RealNetworks. It also supports

 

repositioning during real-time playback.

 

 

eAAC+

eAAC+ is AAC+ with the addition of Parametric Stereo (PS). PS significantly increases

(eAAC+, AAC+

the codec efficiency for low bit rate stereo signals.

V2)

 

 

 

AAC+

‘High-efficiency AAC’ is the official MPEG name for the combination of AAC and

(HE AAC, AAC+)

Spectral Band Replication (SBR). SBR is a bandwidth extension technique enabling

 

audio codecs to deliver the same quality at half the bit rate.

 

 

Video formats

Format

Description

 

 

MPEG-4 ISO File Format (.mp4), ISO/

File formats that are specified as a part of the ISO/IEC MPEG-

IEC 14496-14, including:

4 international standard. It is used to store media types

MPEG-4

defined by the ISO/IEC Moving Picture Experts Group, and

AAC-LC, AMR-NB (audio)

can be used to store other media types as well. It is, typically

 

 

used to store data in files, though it will be used in data

 

 

streams and possibly in other ways. The .mp4 allows

 

 

multiplexing of multiple video and audio streams in one file,

 

 

variable frame- and bit-rates, subtitles and still images. It also

 

 

allows streaming over the Internet.

 

 

3GPP File Format (.3gp), 3GPP TS

File formats which are used in mobile phones to store media

26.234 V5.6.0, including:

(audio/video). This file format is a simpler version of "ISO

MPEG-4, H.263, H.264 (video)

14496-1 Media Format”. This format can only carry video

AAC-LC, AMR-NB (audio)

encoded as MPEG-4, H.263, or H.264. Audio is stored in AAC-

 

 

LC or AMR-NB formats.

 

 

RealMedia

A digital sound and video file format that is the registered

 

 

trademark of RealNetworks. This format is typically used to

 

 

stream media through the net.

 

 

Windows Media Video, WMV

A generic name for the set of video codec technologies

 

 

developed by Microsoft. It is part of the Microsoft Windows

 

 

Media framework.

 

 

 

31

May 2007

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Sony Ericsson P1 manual Video formats, Dls, He Aac, Aac+, MPEG-4