This player appears everywhere when you google "ATJ 2135" and yes... it appears as projects instead of real players...
Here is a resume of characteristics of the chip taken from a legal memory published in USA at the end of 2006 by Actions Semiconductors Ltd.
Device
Thirteen Series
ATJ 2135
Introduction
Date
January 2007
Addressable
Market
Portable Multi-Media
TV player
Digital Video Camera
Available
Functions
• MP3, WMA, DRM, WMA, ASF, OGG, APE, FLAC, WAV
• DRM 10, MTP
• FM Radio
• Voice/FM/ Linein Recording, MP3, WAV,ACT
• Video Play QVGA @25frame- XVID, AMVB
• Picture Browse: JPEG, BMP, GIF
• MP3 encoding
• SD/MMC Card
• SRS WOW+SRS WOW HD+Turbass+Usermode
• TXT,
• Multi task on ucOS, Linux
• USB Slave 2.0
Supplementary
Functions
• MJPEG, WMV, MPEG2 etc
• GAME, Flash,JAVA
• TV-in/out,Coms Sensor,
• Touch pannel
• USB OTG
Display
• 2.0~3.5 QVGA TFT color display
Battery Life
(1) Using a single AA battery, media playback at medium volume level.
• At 550 mAh li BAT
• Video 5h
• Music (LCD on) 7.5h
• Music (LCD off) 12h
Storage
Media
• NAND Flash (SLC/MLC)
• SD/MMC
• NOR Flash
• HDD
Here is shown that screen can reach 3.0", that the chip can have HDD as storage, that OS was made in Linux, that it is OTG (On The Go: can play while is plugged to USB), among other things.
Introduction was not in January 2007 but in 3rd semester, fps finally was not 25 fps but 30 fps.