C-MEDIA ELECTRONICS INC.
28Patents
19Active
28Granted
45Portfolio score
Filing activity: Jan 6, 1999 → Nov 24, 2022 · 3 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7053598B2 | Structure for detecting plug/unplug status of phone-jacks by single bit generated by a resistor network | Physics | 10 | Expired |
| US9824678B1 | Method, system for self-tuning active noise cancellation and headset apparatus | Physics | 9 | Active |
| US7701287B2 | Voltage detection type overcurrent protection device for class-D amplifier | Electricity | 6 | Active |
| US10083707B1 | Voice apparatus and dual-microphone voice system with noise cancellation | Physics | 4 | Active |
| US10186249B1 | Active noise cancellation system | Physics | 4 | Active |
| US6870494B1 | System of multi-channel shared resistor-string digital-to-analog converters and method of the same | Electricity | 3 | Expired |
| US6990210B2 | System for headphone-like rear channel speaker and the method of the same | Electricity | 3 | Expired |
| US6696846B1 | Self-balanced active current bridge for measuring the impedance of an external device | Physics | 2 | Expired |
| US7050596B2 | System and headphone-like rear channel speaker and the method of the same | Electricity | 2 | Expired |
| US6204793A | Sigma-Delta CODEC system | Physics | 1 | Expired |
| US8964920B2 | Auto-determining sampling frequency method and device thereof | Electricity | 1 | Active |
| US6434634B1 | Method and apparatus adaptable to a standard game port of a personal computer for interfacing an external HSP modem, a joystick and a MIDI interface | Electricity | 1 | Expired |
| US7949808B2 | Auto-execution signal processing method and apparatus performing the method | Physics | 1 | Active |
| US9197178B2 | Headphone with active noise cancelling and auto-calibration method thereof | Electricity | 1 | Active |
| US11403061B2 | Audio processing system and method | Electricity | 0 | Active |
| US8525571B2 | Voltage amplitude limiting circuit of full differential circuit | Electricity | 0 | Active |
| US6990382B2 | Control system for digital sound effect and the method of the same | Electricity | 0 | Expired |
| US8803595B2 | Common mode noise cancellation circuit for unbalanced signals | Electricity | 0 | Active |
| US11134358B2 | Audio adjusting method and audio adjusting device | Electricity | 0 | Active |
| US12177649B2 | Virtual reality providing device and audio processing method | Electricity | 0 | Active |
| US8364299B2 | Audio signal transmission apparatus avoiding noise generation and method thereof | Human Necessities | 0 | Active |
| US10013965B2 | Calibration system for active noise cancellation and speaker apparatus | Electricity | 0 | Active |
| US6983054B2 | Means for compensating rear sound effect | Electricity | 0 | Expired |
| US8908719B2 | Clock rate controller and method thereof and electronic device thereof | Physics | 0 | Active |
| US9762253B2 | Reference frequency calibration module and apparatus using the same | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.