Naoki Ejima
32Patents
9h-index
24Co-inventors
75Inventor score
Filing activity: Nov 23, 1988 → Feb 12, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6449596B1 | Wideband audio signal encoding apparatus that divides wide band audio data into a number of sub-bands of numbers of bits for quantization based on noise floor information | Electricity | 107 | Expired |
| US6420980B1 | Lossless compression encoding method and device, and lossless compression decoding method and device | Electricity | 65 | Expired |
| US6829360B1 | Method and apparatus for expanding band of audio signal | Physics | 56 | Expired |
| US7394499B2 | Data transmitting method, data receiving method, data transmitting device, and data receiving device | Electricity | 21 | Expired |
| US5091899A | Time code recording or reproducing apparatus and time code converter | Physics | 21 | Expired |
| US6904403B1 | Audio transmitting apparatus and audio receiving apparatus | Electricity | 18 | Expired |
| US5159502A | Data recording apparatus | Physics | 13 | Expired |
| US5045956A | Data reproducing apparatus | Physics | 10 | Expired |
| US5146448A | Time code recording or reproducing apparatus and time code converter | Physics | 9 | Expired |
| US6751177B1 | Signal processor | Physics | 8 | Expired |
| US8451375B2 | Lip-sync correcting device and lip-sync correcting method | Electricity | 6 | Active |
| US6584443B1 | Apparatus and method for audio data/audio-related information transfer | Physics | 6 | Expired |
| US7356150B2 | Method and apparatus for extending band of audio signal using noise signal generator | Physics | 5 | Expired |
| US7129991B2 | Transmission method of digital audio data with video data | Physics | 4 | Expired |
| US7403139B2 | Electronic apparatus and control method thereof using sample rate converter | Electricity | 3 | Expired |
| US7225388B2 | Error correction encoding and decoding methods and apparatuses for DVI audio data | Electricity | 3 | Expired |
| US7580525B1 | Sub-scrambling/descrambling method and sub-scrambling/descrambling device | Electricity | 2 | Expired |
| US7230650B2 | Data transmission method, data receiving method, video data transmission apparatus and video data receiving apparatus | Electricity | 2 | Expired |
| US5325240A | Data compression and expansion apparatus for audio recorders | Electricity | 2 | Expired |
| US8194519B2 | Method for transmitting content with copy control information, content identification information and content status information | Physics | 2 | Active |
| US8351516B2 | Data transmitter and data receiver | Electricity | 1 | Active |
| US8086202B2 | Method for removing the coupling and correlation of antennas, and wireless device having the function of removing the coupling and correlation of antennas | Electricity | 1 | Active |
| US7069224B2 | Receiver for receiving audio data and audio-related information | Physics | 1 | Expired |
| US8515771B2 | Identifying an encoding format of an encoded voice signal | Electricity | 1 | Active |
| US7188298B2 | Error correction encoding and decoding methods and apparatuses for DVI audio data | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.