摘要
電視是家庭中的娛樂中心，它所播放的節目與多媒體訊息深深影響著我們每 一天的生活；如何使電視能更容易的被使用、有更佳的可靠度以及有更好的畫質 是現今研究課題之一。基於歐規電視系統平台，在此論文中，我們提出階層化與模組化來設計LCD TV 工作平台，並包含一個微小化的控制核心，此核心被稱為精簡型TV 嵌入式作業系統(STVEOS)。當利用階層化與模組化設計能在不同的平台系統需求下達到其相容目的，此方法也提供API 層，使得韌體層更容易撰寫與提高程式碼重複的使用性。 在系統控制方面，STVEOS 是運行於8051 上的微小化控制核心，此核心是以定時觸發機制的方式執行不同的狀態機，完成系統的流程控制；當有新增輸入源的需求時，在不影響其它已有輸入源的情況下，可以新增控制狀態機，因此，具有良好的擴充能力。為了使電視更人性化之使用，我們描述一個使用頻率自動掃描的頻道搜尋演算法，它可以讓使用者在不需要設定影像格式的情況下自動搜尋並識別頻道。此外，我們加了一個π 型低通濾器濾除電視系統中的高頻雜訊來改善畫質。最後我們實作一台15 吋歐規LCD TV 來驗證我們的結果；我們也展示π 型低通濾器降噪的程度，同時，實作系統也通過LCD TV 的品質驗證與中國地區的實地測試。
並列摘要
TV is a major entertainment center at home; moreover, the information of TV program influences everyone’s daily life. It is one of the researching topics, how enable TV using, having good reliability, and having better picture quality, now. Based on European standard, in this paper, we propose the layer structure and modulo method to design the LCD TV system. Moreover, our method includes a novel tiny kernel, Simply TV Embedded Operation System briefly denoted by STVEOS which can effectively manage various inputs of the audio-video system and support commands of user requirements. These layer structure and modulo design can meet the compatibility requirements for different platforms. Moreover, our method not only can easily support an API layer to port firmware code but also can improve the code re-usable capability. STVEOS can work at 8051 chip with micro-controller. Our proposed kernel executes the different states by regularly triggered mechanism to finish its control processes. When there is a requirement of the new input source, this kernel can easily extend the new state machine of this extra input without affecting other inputs. Therefore, our kernel has good extensibility. In order to make TV more users humanized, we also propose an auto-scan algorithm for tuner input, which can automatically search and discern the TV channel without setting image format. Furthermore, the π-type low-pass filter can reduce the impact of high frequency noise in our system to improve the picture quality. Finally, we implement a 15” LCD TV with European specification to verify our proposed results. Meanwhile, this system also passes the QA tests, he performance check, monkey test, system stability test, China frequency acceptance test, etc., of LCD TV and China area.