JVC KD-G731 - Инструкция по эксплуатации - Страница 31

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31

REFERENCES

  –  Discs are dirty or scratched.
  –  Moisture condensation occurs on the lens inside 

the unit.

  –  The pickup lens inside the unit is dirty.
  –  CD-R/CD-RW on which the files are written with 

“Packet Write” method.

  –  There are improper recording conditions (missing 

data, etc.) or media conditions (stained, scratched, 
warped, etc.).

•  CD-RWs may require a longer readout time since the 

reflectance of CD-RWs is lower than that of regular 
CDs.

•  Do not use the following CD-Rs or CD-RWs:
  –  Discs with stickers, labels, or a protective seal stuck 

to the surface.

  –  Discs on which labels can be directly printed by an 

ink jet printer.

  Using these discs under high temperatures or high 

humidities may cause malfunctions or damage to the 
unit.

Playing an MP3/WMA/AAC disc

•  This unit can play back MP3/WMA/AAC files with 

the extension code <.mp3>, <.wma>, or <.m4a> 
(regardless of the letter case—upper/lower).

•  This unit can show the names of albums, artists 

(performer), ID3 Tag (Version 1.0, 1.1, 2.2, 2.3, or 2.4) 
for MP3, and show WMA/AAC Tag.

•  This unit can display only one-byte characters. No 

other characters can be correctly displayed.

•  This unit can play back MP3/WMA/AAC files meeting 

the conditions below:

  –  Bit rate of MP3: 8 kbps — 320 kbps
  –  Sampling frequency of MP3:
    48 kHz, 44.1 kHz, 32 kHz (for MPEG-1)
    24 kHz, 22.05 kHz, 16 kHz (for MPEG-2)
    12 kHz, 11.025 kHz, 8 kHz (for MPEG-2.5)
  –  Bit rate of WMA:  16 kbps — 32 kbps
     

(Sampling frequency: 22.05 kHz)

32 kbps — 320 kbps

(Sampling frequency: 48 kHz, 
44.1 kHz, 32 kHz)

  –  Bit rate of AAC: 16 kbps — 320 kbps
  –  Sampling frequency of AAC: 48 kHz, 44.1 kHz
  –  Disc format: ISO 9660 Level 1/Level 2, Romeo, 

Joliet, Windows long file name

•  The maximum number of characters for file/folder 

names vary among the disc format used (includes 
4 extension characters—<.mp3>, <.wma>, or 
<.m4a>).

  –  ISO 9660 Level 1: up to 12 characters
  –  ISO 9660 Level 2: up to 31 characters
  –  Romeo*: up to 128 (60) characters
  –  Joliet*: up to 64 (30) characters
  –  Windows long file name*: up to 128 (60) 

characters

* 

The parenthetic figure is the maximum number of 
characters for file/folder names in case the total 
number of files and folders is 271 or more.

•  This unit can recognize a total of 512 files, of 200 

folders, and of 8 hierarchies.

•  This unit can play back files recorded in VBR (variable 

bit rate).

  Files recorded in VBR have a discrepancy in elapsed 

time display, and do not show the actual elapsed 
time. Especially, after performing the search function, 
this difference becomes noticeable.

•  This unit cannot play back the following files:
  –  MP3 files encoded with MP3i and MP3 PRO format.
  –  MP3 files encoded in an inappropriate format.
  –  MP3 files encoded with Layer 1/2.
  –  WMA files encoded with lossless, professional, and 

voice format.

  –  WMA files which are not based upon Windows 

Media® Audio.

  –  WMA files copy-protected with DRM.
  –  AAC files created by any other application than 

iTunes.

  –  AAC files encoded with Apple lossless format.
  –  Files which have the data such as AIFF, ATRAC3, 

etc.

•  The search function works but search speed is not 

constant.

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