CXD2053AM Ver la hoja de datos (PDF) - Sony Semiconductor

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CXD2053AM

Auto Wide, EDTV-II ID Detection, ID-1 Detection

Sony Semiconductor 

CXD2053AM/AS

1. Description of auto wide function

The auto wide function performs wide screen identification from the black bands at the top and bottom of the

screen. As shown below, the CXD2053AM/AS identifies the three types of 4:3 normal video, 16:9 wide video,

and wide video with subtitles.

4:3 normal video

16:9 wide video

Fig. 1. Wide identification types

Wide video with subtitles

The results of this auto wide identification are expressed by 2 bits, and are output through the I2C bus during

bus mode. Also, these results are output directly to the OAW1 (Pin 26) and OAW2 (Pin 27) pins regardless of

bus or bus-free mode.

Auto wide identification is provided with a transition time of about 1 to 15 seconds to prevent misoperation.

During I2C bus mode, wide identification can be changed quickly without this transition time by manipulating

the INST bit.

2. Description of ID-1 (transmitter method of additional video information, aspect ratio identification)

As shown in the table below, the additional video information consists of 14-bit data, to which a 6-bit CRCC is

appended for a total of 20 bits. On an NTSC video signal, this information is carried on lines 20 and 283 of the

vertical blanking interval.

A

WORD0

B

WORD1

WORD2

bit-No

Description

"1"

"0"

1

Transmitter aspect ratio

Full mode (16:9)

2

Pictorial representation format

Letter-box

3

Undefined

4:3

Normal

4

5

6

Discrimination information about the video signal and any other signal (audio

signal, etc.) incident to the video and transmitted simultaneously.

4-bit width Word 0 dependent discrimination signal

4-bit width Word 0 dependent discrimination signal, information, etc.

(From the Provisional Standard of EIAJ, CPX-1204)

Table 1. Description of ID-1 signal

Of the 14-bit data noted above, only the first 2 bits are handled by the CXD2053AM/AS. These 2 bits are

obtained by the I2C bus during bus mode. Also, these bits are output directly to the OLBX (Pin 24) and O164

(Pin 25) regardless of bus or bus-free mode.

–6–

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