| 发明名称 | Television tuner and method thereof | ||
| 摘要 | The invention provides a digital television tuner having at least two branches that receive a radio frequency signal, wherein the radio frequency signal carries M channels (M is a positive integer). A target image data is generated in real time since at least one of the branches pre-extracts the image compression data of the next channel to be switched to. | ||
| 申请公布号 | US8976301(B2) | 申请公布日期 | 2015.03.10 |
| 申请号 | US200711896242 | 申请日期 | 2007.08.30 |
| 申请人 | Realtek Semiconductor Corporation | 发明人 | Chang Yi-Shu |
| 分类号 | H04N5/455;H04N5/44;H04N5/50;H04N21/426;H04N21/438 | 主分类号 | H04N5/455 |
| 代理机构 | McClure, Qualey & Rodack, LLP | 代理人 | McClure, Qualey & Rodack, LLP |
| 主权项 | 1. A tuner, having Pn branches (Pn is a positive integer), all receiving a radio frequency signal that carries M channels (M is a positive integer and M≧Pn), comprising: Pn radio frequency tuners, provided in the Pn branches for receiving the radio frequency signal, respectively, a first radio frequency tuner extracting an Nth channel signal (N is a positive integer and N<M) from the frequency band of the radio frequency signal and converting the Nth channel signal into a first intermediate frequency signal while a second radio frequency tuner extracts an (N+1)th channel signal or an (N−1)th channel signal from the frequency band of the radio frequency signal and converting the (N+1)th channel signal or the (N−1)th channel signal into a second intermediate frequency signal, wherein the Pn radio frequency tuners convert Pn channel signals into Pn intermediate frequency signals; an intermediate frequency demodulating and image decoding device for converting the first intermediate frequency signal into a first image compression data and the second intermediate signal into either a second image compression data or a third image compression data, and decoding the first image compression data into a target image data, wherein if the user switches to an (N+1)th channel corresponding to the (N+1)th channel signal, the image decoding device decodes the second image compression data into the target image data, and if the user switches to an (N−1)th channel corresponding to the (N−1)th channel signal, the image decoding device decodes the third image compression data into the target image data; and a signal filter with a bandwidth of Pn times, for filtering a number of Pn intermediate frequency signals. | ||
| 地址 | Hsinchu TW | ||