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Figure 5-4: Auxiliary Data Stream Signal

The figure below shows the relationship between the data bit-field and its clock cycle based on 1-, 2-, or 4-

symbol per clock mode.

PB22

PB21

PB15

PB14

PB8

PB7

PB1

PB0

HB0

Phase 0

PB24

PB23

PB17

PB16

PB10

PB9

PB3

PB2

HB1

Phase 1

PB26

PB25

PB19

PB18

PB12

PB11

PB5

PB4

HB2

Phase 2

BCH3

PB27

BCH2

PB20

BCH1

PB13

BCH0

PB6

Phase 3

BCH Block 3

BCH Block 2

BCH Block 1

BCH Block 0

Output Data

Byte[8]

Byte[0]

Startofpacket

Endofpacket

Valid

Clock

0 - - 8 - - 16 - - 24

Cycle 1 Symbol

0 - - 4 - - 8 - - 12

Cycle 2 Symbol

0 - - 2 - - 4 - - 6

Cycle 4 Symbol

Phase 0 Phase 1

Phase 2

Phase 3

The data output at EOP contains the received BCH error correcting code. The sink core does not perform

any error correction within the core. The auxiliary data is available outside the core.

Note:

You can find the bit-field nomenclature in the HDMI Specification Ver.2.0.

Sink Auxiliary Packet Capture

The auxiliary streams transfer auxiliary packets.

The auxiliary packets can carry 15 different packet types.

The module produces 4 valid signals to simplify the user logic.

To simplify user applications and minimize external logic, the HDMI core captures 3 different packet

types and decodes the audio sample data. These packets are: General Control Packet, Auxiliary Video

Information (AVI) InfoFrame, and HDMI Vendor Specific InfoFrame (VSI).

UG-HDMI

2015.05.04

Sink Auxiliary Packet Capture

5-5

HDMI Sink

Altera Corporation

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