Privacy Policy

Welcome to our website. To help you use our services with confidence, we explain our privacy policy below to safeguard your rights. Please read the following information carefully:

Scope of the Privacy Policy: This privacy policy applies to all personal data collected by this website, including how we collect, process, and use such data when you use our services. This policy does not apply to other linked websites or personnel not managed by this website.
Collection, Processing, and Use of Personal Data: When you visit our website or use our services, we may ask for necessary personal information, which will be processed and used only for specified purposes. Without your written consent, we will not use your personal data for other purposes.
Legal Basis for Processing Data: We process your personal data based on your consent, to fulfill contractual obligations, or for our legitimate business interests, such as enhancing user experience or conducting analysis.
Data Protection: We adopt multiple security measures to protect your personal data, including firewalls and antivirus systems. Only authorized personnel can access your data, and they must sign confidentiality agreements. When we outsource services, we require that they comply with confidentiality obligations and ensure data security.
External Links: Our web pages may contain links to external websites. These linked websites do not fall under our privacy policy, and you should refer to their respective privacy policies.
Sharing Personal Data with Third Parties: We do not provide, exchange, rent, or sell your personal data to third parties, except as required by law or contractual obligations. We may share your data under the following circumstances:
- With your written consent.
- As required by law.
- To protect your life, body, freedom, or property from danger.
- For statistical or academic research with public institutions or academic research organizations, ensuring data is anonymized.
- When your actions on the website violate the terms of service, necessitating identification, contact, or legal action.
Data Retention: We retain personal data only for as long as is necessary to fulfill the purposes outlined in this policy, or as required by law. When the retention period ends, we delete or anonymize the data to ensure privacy.
Your Rights: Under applicable privacy laws, you have the right to request access to your personal data, correct inaccuracies, request deletion of your data, object to processing, and request data portability. You also have the right to lodge a complaint with a supervisory authority.
Use of Cookies: To provide you with the best service experience, we use cookies on your device. If you do not wish to accept cookies, you can increase the privacy level in your browser settings to refuse cookies. This may, however, affect the availability of certain features. You can also manage your cookie preferences through our Cookie Settings.
Privacy Policy Revisions: We may revise the privacy policy as needed, and any changes will be published on this website to ensure you are informed of how we handle your personal data.

HDMI (High Definition Multimedia Interface)

High Definition Multimedia Interface (HDMI) is a digital interface for transmitting video and audio, capable of transmitting uncompressed audio and video signals. HDMI can be used in set-top boxes, DVD players, personal computers, game consoles, AV receivers, digital sound systems, and televisions. HDMI can transmit both audio and video signals simultaneously, simplifying system installation by using a single cable for both signals.

HDMI is designed to replace older analog audio/video interfaces such as SCART or RCA. It supports various video formats for TVs and computers, including SDTV and HDTV, as well as multi-channel digital audio. During transmission, various video data is encoded into data packets by HDMI transceiver chips using Transition Minimized Differential Signaling (TMDS) technology. At its initial specification, the maximum pixel transmission rate was 165Mpx/sec, sufficient to support 1080p quality at 60 frames per second or UXGA resolution (1600x1200); later, the HDMI 1.3 specification increased this to 340Mpx/sec to accommodate future needs.

HDMI also supports uncompressed 8-channel digital audio transmission (sampling frequency 192kHz, data length 24 bits/sample), as well as any compressed audio streams such as Dolby Digital or DTS, and supports the 1-bit DSD signal used in SACD for 8 channels. In HDMI 1.3, support for high-bandwidth uncompressed audio streams such as Dolby TrueHD and DTS-HD was also added.

The standard Type A HDMI connector has 19 pins, and a Type B connector that supports higher resolutions has been defined, but no manufacturers currently use the Type B connector. The Type B connector has 29 pins and allows for the transmission of expanded video channels to meet future high-definition demands, such as WQSXGA (3200x2048).

Type A HDMI is backward compatible with the Single-link DVI-D or DVI-I interfaces used by most displays and graphics cards today (but not DVI-A). This means that a signal source using a DVI-D interface can drive an HDMI monitor through a conversion cable, but this conversion scheme does not support audio transmission and remote control functions. Furthermore, non-HDCP certified DVI displays will not be able to view HDCP-protected video data output from HDMI. (All HDMI displays support HDCP, but most DVI displays do not support HDCP.) The Type B HDMI connector will also be backward compatible with Dual-link DVI interfaces.

The HDMI organization was initiated by major consumer electronics manufacturers such as Hitachi, Panasonic, Quasar, Philips, Sony, Thomson RCA, Toshiba, and Silicon Image. Digital Content Protection, LLC provides copy protection technology related to the HDMI interface. Additionally, HDMI is supported by major film studios such as 20th Century Fox, Warner Brothers, Disney, as well as major consumer electronics manufacturers including Samsung Electronics and several cable system operators.

One of the main issues with HDMI is its cable length limit. Some consumer tests report that standard 28 AWG (American Wire Gauge) HDMI copper cables begin to experience signal degradation after exceeding 5 meters. This length is typically insufficient for connecting projectors and computers.

However, the HDMI organization does not recognize this limitation; its FAQ page states, "We have seen cables pass compliance testing without adapters through standard HDMI cables not shorter than 10 meters."

Currently, HDMI-certified 10M cables (without HDMI equalizer IC) are mostly made using 24 AWG wire.

Some reports indicate that increasing the diameter of the copper wire in the cable to reduce impedance is one effective method to extend cable length, and other reports suggest that 24 AWG cables perform better than 28 AWG cables. Additionally, some users have replaced standard HDMI copper cables with fiber optics or two CAT-5 network cables. Some manufacturers also produce HDMI signal enhancers to meet user needs.

Currently, a single HDMI equalizer IC can extend the maximum length of a 24 AWG HDMI cable to 50 meters. If sufficient and clean power is provided, it can be cascaded further.