公开(公告)号：US20080036859A1

公开(公告)日：2008-02-14

申请号：US11502895

申请日：2006-08-11

申请人： Yuh-Chin Chang ,  Hui-Ya Chou

发明人： Yuh-Chin Chang ,  Hui-Ya Chou

IPC分类号： H04N7/18

CPC分类号： H04N21/6168 ,  H04N21/4223 ,  H04N21/4402

摘要： A digital surveillance camera includes a video capture component, a data converter coupled to the video capture component and a signal transmission unit coupled to an output terminal of the data converter. The data converter processes the video signal with high frequency components from the video capture component in digital domain to generate the video signal in a specific format to be further transmitted in the digital serial differential form. The signal transmission unit transmits the signal via either an optical fiber or a cable with characteristics of long-distance transmission and lowers the resulting signal loss to ensure the quality of the received video signal.

摘要翻译： 数字监控摄像机包括视频捕捉组件，耦合到视频捕捉组件的数据转换器和耦合到数据转换器的输出端的信号传输单元。 数据转换器利用来自数字域中的视频捕获组件的高频分量处理视频信号，以特定格式产生视频信号，以数字串行差分格式进一步发送。 信号传输单元通过具有长距离传输特性的光纤或电缆发送信号，并降低所产生的信号损耗，以确保接收到的视频信号的质量。

公开(公告)号：US20050091052A1

公开(公告)日：2005-04-28

申请号：US10758533

申请日：2004-01-16

申请人： Yuh-Chin Chang ,  Peng-Cheng Chen ,  Hui-Ya Chou ,  Hong-Tsan Lee

发明人： Yuh-Chin Chang ,  Peng-Cheng Chen ,  Hui-Ya Chou ,  Hong-Tsan Lee

IPC分类号： G10L19/02 ,  G10L19/14 ,  H04N9/802

CPC分类号： G10L19/24

摘要： A variable frequency decoding apparatus operable in a portable audio device that can improve the power management is disclosed. The above apparatus has a decoder and a clock generator that provides the system clock for the decoder. When a bit stream representing audio compressed data is received, the decoder simultaneously provides the audio information embedded in the audio compressed data such as the bit rate and the sampling frequency of the data frame to the clock generator, and then the clock generator adjusts the clock signals; which are used by the decoder to restore to the original PCM format, to match the audio information embedded in the data frame. This audio signal compression technique can prevent possible output delay and reduce power consumption as compared with the conventional way that used a fixed sys clock.

摘要翻译： 公开了一种在可改善电源管理的便携式音频设备中可操作的可变频率解码装置。 上述装置具有提供解码器的系统时钟的解码器和时钟发生器。 当接收到表示音频压缩数据的比特流时，解码器同时将音频压缩数据中嵌入的音频信息（例如数据帧的比特率和采样频率）提供给时钟发生器，然后时钟发生器调整时钟 信号; 其被解码器使用以恢复到原始PCM格式，以匹配嵌入在数据帧中的音频信息。 与使用固定系统时钟的常规方式相比，该音频信号压缩技术可以防止可能的输出延迟并降低功耗。

公开(公告)号：US20050078216A1

公开(公告)日：2005-04-14

申请号：US10758532

申请日：2004-01-16

申请人： Yuh-Chin Chang ,  Hui-Ya Chou ,  Hong-Tsan Lee ,  Peng-Cheng Chen

发明人： Yuh-Chin Chang ,  Hui-Ya Chou ,  Hong-Tsan Lee ,  Peng-Cheng Chen

IPC分类号： G10L19/00 ,  G11B15/00 ,  H04N7/00 ,  H04N7/173 ,  H04N11/00

CPC分类号： G10L19/005

摘要： A method of improving performance and power utilization of portable a CD player with an electronic anti-shock system (EASS) is disclosed. When PCM signals are received by the EASS, the audio signals are compressed with a high compression rate algorithm and saved in a temporary memory, and later when the audio data are read out from the temporary memory, the audio data are decoded with the same audio compression algorithm to restore to the original PCM format, thus a data buffering is created between the reading of data and the playback of sound. A high compression rate algorithm can increase the utilization of DRAM memory and lengthen the buffering time considerably. The present invention has incorporated an audio compression algorithm having high compression rate in the EASS to attain the most desirable balance point between audio performance, power management, and costs.

摘要翻译： 公开了一种提高具有电子防冲击系统（EASS）的便携式CD播放机的性能和功率利用率的方法。 当EASS接收到PCM信号时，以高压缩率算法对音频信号进行压缩并保存在临时存储器中，之后当从临时存储器中读出音频数据时，音频数据以相同的音频被解码 压缩算法恢复到原始的PCM格式，从而在数据读取和声音播放之间创建数据缓冲。 高压缩率算法可以增加DRAM存储器的利用率，大大延长缓冲时间。 本发明结合了EASS中具有高压缩率的音频压缩算法，以获得音频性能，功率管理和成本之间最理想的平衡点。

公开(公告)号：US20050025251A1

公开(公告)日：2005-02-03

申请号：US10660504

申请日：2003-09-12

申请人： Yuh-Chin Chang ,  Hui-Ya Chou ,  Peng-Cheng Chen ,  Hong-Tsan Lee

发明人： Yuh-Chin Chang ,  Hui-Ya Chou ,  Peng-Cheng Chen ,  Hong-Tsan Lee

IPC分类号： H03M7/38 ,  H04B14/04 ,  H04B14/06

CPC分类号： H03M7/3046 ,  H04B14/048 ,  H04B14/066

摘要： A method of optimizing the compression rate in Adaptive Differential Pulse Code Modulation (ADPCM) is disclosed. The modified pulse code modulation technique employs a prognostic code converter to generate variable length codes on top of the ADPCM coding, based on the probability of occurrence of data bits in a data sample. This variable-length coding is able to further reduce the compressed data size by increasing the compression rate of the conventional ADPCM coding.

摘要翻译： 公开了一种在自适应差分脉冲编码调制（ADPCM）中优化压缩率的方法。 基于在数据样本中发生数据位的概率，经修改的脉码调制技术采用预测码转换器在ADPCM编码之上生成可变长度码。 该可变长度编码能够通过增加常规ADPCM编码的压缩率来进一步减小压缩数据大小。

公开(公告)号：US20100011143A1

公开(公告)日：2010-01-14

申请号：US12292162

申请日：2008-11-13

申请人： Yuh-Chin Chang ,  Hui-Ya Chou ,  Hsiang-Lin Yeh

发明人： Yuh-Chin Chang ,  Hui-Ya Chou ,  Hsiang-Lin Yeh

IPC分类号： G06F13/00

CPC分类号： G06F13/4045 ,  G09G5/006 ,  G09G2370/12 ,  H04N5/765

摘要： A high-definition multimedia interface (HDMI) extender compatible with high-bandwidth digital content protection (HDCP) has a data receiver for receiving video/audio data and a data transmitter for transmitting the video/audio data to a display device. An Ethernet cable consisting of eight cores is connected between the data receiver and the data transmitter. When either the video/audio data or the display device complies with the HDCP, a voltage signal with level variation is transmitted between the data receiver and the data transmitter through the Ethernet cable to permit the display device to display the video/audio data.

摘要翻译： 与高带宽数字内容保护（HDCP）兼容的高分辨率多媒体接口（HDMI）扩展器具有用于接收视频/音频数据的数据接收器和用于将视频/音频数据发送到显示设备的数据发送器。 在数据接收器和数据发送器之间连接由八个核心组成的以太网电缆。 当视频/音频数据或显示设备符合HDCP时，具有电平变化的电压信号通过以太网电缆在数据接收器和数据发送器之间传输，以允许显示设备显示视频/音频数据。