Parental Control Menu; Decoding - Sony WEGA KV27FV15 Training Manual
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- Operating instructions manual (42 pages) ,
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Parental Control Menu
Sony V Chip equipped televisions contain the Parental Control Menu,
which is located in the Setup section. When it is selected, the user will be
asked for a 4-digit password. After this password is entered, the user will
be asked to confirm it. After confirmation, the password is set. Anytime
the user wants to modify the Parental Control Menu, the password must
be entered. Note: If the customer forgets their password, the master
Password 4357 can be entered. This allows the customer to reset
their password. No settings can be changed until a new password
is entered.
When you have entered the password, an options menu will be displayed.
The options are as follows.
Parental Lock: This is used to enable or disable the ratings system. This
is done by selecting On or Off.
Rating: There are four ratings that can be selected.
Child – The child selection is used to enable only TV-Y, TV-Y7, TV-G
and G ratings.
Youth – The youth selection is used to enable TV-PG and PG ratings.
Ratings considered lower than these will also be enabled.
Youth Adult –Tthe youth adult selection enables TV-14 and PG-13
ratings in addition to lower ratings.
Custom – The custom selection allows you to tailor the age and con-
tent ratings to your liking. The picture below shows the menu that will
be seen when custom is selected.
Here the user can select ratings by age or content. If they do not want
violence of any kind to be seen but are not offended by strong language,
they can select the V for PG-14. This will block all V settings above PG-
14.
Decoding
The Parental Guideline Rating that is broadcast by the programmer must
be decoded at the receiver. This rating data is placed on Line 21 Field 2
or Line 284.
The preceding waveform shows the contents of Line 21 Field 2. We see
that right after the burst signal on the back porch of the horizontal sync is
a clock signal. This clock is used to inform the decoder that data is com-
ing and to synchronize the decoder and data. Since there is other XDS
(Extended Data Services) data on this line, the first three data bits are
known as the identifier. Data 001 identifies the data as Parental Ratings
data. Then two bytes of data are sent which contain the rating informa-
tion. The first byte contains information about the age rating and the
second contains information about the content rating.
Ratings are decoded by the System Control IC in Sony televisions. These
ICs contain the programmed information and the decoder. When a pro-
gram is determined to have a rating that should be blocked, this is recog-
nized. The System Control IC also contains the OSD outputs. When the
program is to be blocked, the OSD section outputs a black screen along
with the blocked show's rating. For example, if the Parental Controls are
set to Child and the received program is rated TV-14, the screen will be
black with TV Rating TV 14 in white letters.
There is also an additional V-Chip IC used on sub-tuner video. This pre-
vents blocked programs from being displayed in the PIP window.
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