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S-Video, also known as Y/C, is an analog video signal cable that separates an image’s chrominance (C component) and brightness (luma, Y component) into two separate signals for transmission. It does not carry sounds; it just transmits video data.
How S-Video Cables Work
Two identical 75Ω conductors—typically twin coaxial cables—encased in a single shielded jacket make up an S-Video cable. The chrominance (color) is carried by conductor C, while conductor Y carries the luminance (brightness) and sync pulses. The cable contains four wires, since each signal pair has its own ground.
Each end of most S-Video cables features a 4-pin mini-DIN connector, a small, circular plug. The video format remains Y/C, even though some professional devices use twin RCA/BNC connectors or a 7-pin mini-DIN connector, which still transmit the same Y/C signals.
S-Video vs. Other Video Cable Types
- Composite vs S-Video: All picture data is carried on a single channel, represented by a single yellow RCA connection. Because S-Video uses two channels, it produces fewer artifacts and offers much better clarity.
- Component vs. S-Video: Component video—which uses three wires for Y, Pb, and Pr—offers higher color detail. S-Video has a lower total color resolution due to its narrower single-chroma channel.
- HDMI vs. S-Video: HDMI is a digital interface that supports HD/4 K audio and video. S-Video is an analog format; it only carries SD video, not audio.
Where S-Video Cables Are Used
Older video equipment usually has S-Video connections. For instance, many VCRs, game consoles, DVD players, and even some video cameras have an S-Video output. To obtain cleaner video from their analog sources, these devices employed S-Video. Modern TVs generally eliminate S-Video connections; however, some professional AV hardware, projectors, and monitoring systems still contain S-Video ports for compatibility.
In Europe, separate S-Video ports were rare, as most TVs used the SCART interface, which often carried RGB video.
Choosing an S-Video Cable
High-quality S-Video cables have two 75Ω coaxial cores within a single shield and gold-plated 4-pin mini-DIN plugs. Keep runs short (15 ft or less) to reduce signal loss, and remember that S-Video only transports video (audio requires a separate connection).
Custom and Specialty S-Video Cable Solutions
Professional cable assembly manufacturer Romtronic has been providing OEM and ODM services for decades. Major electronics brands, such as Samsung and Siemens, have sourced components from its plant. The company specializes in custom cables and accepts small orders (as low as 50 pcs), making tailored S-Video and specialty video harnesses practical.
Whether you require atypical lengths, unique connectors (e.g., hybrid A/V cables), or bespoke testing and labeling, Romtronic’s engineering team can design a one-off solution tailored to your professional requirements.
🔍 Need a specialty S-Video solution just for your setup?
Our engineering team can craft bespoke video harnesses with custom connectors, labeling, and testing — built to your precise needs, even for small batches.
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Frequently Asked Questions (FAQs)
Q1: Does S-Video carry sound?
No—you must use separate audio cables (typically red & white RCA).
Q2: Is S-Video better than RCA?
Yes. Compared to composite RCA, S-Video produces crisper visuals and better color separation because it splits the signal.
Q3: Can S-Video do 1080p HD?
No, S-Video is only compatible with standard-definition 480i.
Alex Wang is the Marketing Manager at Romtronic, with a degree in International Business and over seven years of experience in the electronic cable and wire harness industry. He leads marketing efforts across North and South America, combining deep industry knowledge with strong sales experience.
In addition to overseeing global marketing strategy, Alex is also responsible for content development and editorial coordination, ensuring that Romtronic’s messaging remains clear, consistent, and engaging. His strength in market analysis and customer-focused approach helps clients make more informed purchasing and sales decisions.
