Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [spdif]

22 questions
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2 answers

SPDIF to CMOS logic

I am trying to get around my head on the three questions below. Is SPDIF protocol is really driving 0.5 V pk-pk without having any DC offset? If yes, HDMI1.4 mentions ARC protocol which is adhered to SPDIF standards. ARC line is 75 ohm impedance…
Atharva Upadhye
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3 answers

S/PDIF: TTL to Coax Converter

I'm working on converting TTL S/PDIF to Coaxial level (0.5Vpp). I have implemented the following circuit using a Toshiba TC7W04, which is a 74HC04-type inverter: But it does not appear to work in practice (I am working on getting access to a scope…
t3ddftw
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1 answer

Sample Rate Converter

I'm a novice when it comes to digital audio. What's the best way to convert 48 kHz I2S to 44.1 kHz? I have found the Texas Instruments SRC4392 but I do not believe that it will work for this application. I have a Bluetooth module that outputs audio…
t3ddftw
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2 answers

Logic inverter feedback resistor, SPDIF Input/Ouput circuit

What purpose of these resistors? Spdif level about 0.5Vpp. Do I need use feedback resistor if I will convert 3.3V SPDIF to 5V? I want to make 4-way SPDIF Input/Output for WM8805 I2S<>SPDIF converters, and made a schematic. What should I do…
Yiffme
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1 answer

XO selection for 44.1kHz audio

I'm implementing a WM8804 S/PDIF transmitter in a project I'm working on. The datasheet states that clocks from 10MHz - 27MHz are supported. What crystal oscillator frequency should I look for in order to support 44.1kHz I2S output given a an input…
t3ddftw
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2 answers

I2S MCLK Generation

I'm working with a Sierra Wireless BC127 (Bluetooth Module) I2S master which is generating Left-Justified, 16 bps @ 44.1khz sample rate. The Bit clock is set to 2.822 Mhz. I want to use a Cirrus Logic WM8804 to convert the I2S data to S/PDIF @…
t3ddftw
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1 answer

Coaxial S/PDIF input circuit

Can someone shed some light on the rationale for the SPDIF coaxial input circuits in: (1) the DIR9001 evaluation board (see schematics, page 7), and (2) in this Application Note from ST (see Figure 10 on page 12). They both use 74xx logic gates but…
Cal-linux
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3 answers

S/PDIF over mini TRS jack

I am designing a small digital synthesizer. Because of space constrictions, I can only use 3.5mm TRS connectors. RCA is already too big. If possible, I'd like to include not only an analog output, but also a digital output over S/PDIF (coax). I know…
Spatz
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How to convert a CD player's coax diigital output to a Toslink?

My question is essentially the same as this one, except my signal flow is in the opposite direction: Connecting an optical transmitter to a S/PDIF coaxial output I'm not sure of the optical transmitter's part number because I am reusing one from an…
user160409
1
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2 answers

Connecting Toslink TORX179L optical receiver directly to S/PDIF coaxial input

My goal is to convert optical audio signal - Toslink - to S/PDIF coaxial input signal. The frequency is up to 96 KHz. I'm thinking about Toshiba TORX179L optical receiver. According to the datasheet, the output of TORX179L is 0,2V low, and 4V high…
Ernestas Gruodis
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1 answer

Does any RCA connector work for S/PDIF interface?

I'd like to work with this chip : http://www.cirrus.com/cn/pubs/proDatasheet/WM8804_v4.5.pdf The S/PDIF Input mentioned in the datasheet states that the input impedance is 75Ohm. So I think that it should be used with 75Ohm coaxial cable, with RCA…
RWIN
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How long is the S/PDIF preamble?

I have a simple S/PDIF protocol question that I can't find the answer to anywhere. I'm trying to understand the protocol, and everywhere I look says the same thing: The length of a preamble pattern is 8 bits, but the allocated length in the word…
ezra_vdj
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S/PDIF standard sample rate and channel status bits

I am planning to create a S/PDIF output stream for a digital audio device, but there is some ambiguity on the standard and how it is used. I would like to have the confusion cleared up. To start, there are two similar standards the AES3 and S/PDIF.…
techmann
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Can I connect S/PDIF line from TOSLINK to coax?

Since the original analog audio in my device (MiSTerfpga) is bad, I'm using an external TOSLINK-to-RCA-stereo DAC. Now I'd like to merge this setup into the device. I'd like to know if wiring the S/PDIF line from GPIO1/pin9 to the coax-input of the…
Alex
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non-trademarked name for Toslink connector?

My PC motherboard has header pins for a SPDIF output and I want to an optical SPDIF transmitter. When I search any of the main electronic stores for optical SPDIF transmitter I dont get any good hits, I can find some if I search Toslink transmitter,…
Jay
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