公开(公告)号：US20110298976A1

公开(公告)日：2011-12-08

申请号：US13128422

申请日：2009-11-06

申请人： Andreas Aust ,  Stelian F. Persa

发明人： Andreas Aust ,  Stelian F. Persa

IPC分类号： H04N7/01 ,  H04N7/24

CPC分类号： H04N21/6437 ,  H04N21/2343 ,  H04N21/2381 ,  H04N21/2383 ,  H04N21/64322

摘要： A method for converting video data comprises providing video data in a first format, selecting consecutive pixel data corresponding to a line or fraction of a line of an image, and adapting a maximum length of a data packet to accommodate the selected pixel data. The payload section of a data packet exclusively carries pixel data originating from one single line of the source image. The method further comprises calculating a start address for a memory in a receiver beginning at which address the pixel data is to be written. The start address is added to a header section of the data packet in the transmitter. The data packet is transmitted via a network. In the receiver the pixel data is written to the memory beginning at the start address indicated in the header section. Video data is read from the target memory in accordance with a second format.

摘要翻译： 一种用于转换视频数据的方法包括以第一格式提供视频数据，选择对应于一行或一部分图像行的连续像素数据，以及调整数据分组的最大长度以适应所选择的像素数据。 数据分组的有效载荷部分仅传送源自源图像的一条单行的像素数据。 该方法还包括计算接收器中的存储器的开始地址，从该地址开始写入像素数据。 起始地址被添加到发射机中的数据分组的报头部分。 数据包通过网络传输。 在接收器中，像素数据从标题部分中指示的起始地址开始写入存储器。 根据第二格式从目标存储器读取视频数据。

公开(公告)号：US06873950B1

公开(公告)日：2005-03-29

申请号：US09629109

申请日：2000-07-31

申请人： Walter Voessing ,  Fei Gao ,  Andreas Aust

发明人： Walter Voessing ,  Fei Gao ,  Andreas Aust

IPC分类号： G06T9/00 ,  G10L19/02 ,  G10L25/27 ,  H03M7/30 ,  G10L19/00

CPC分类号： G10L19/0212 ,  G06T9/007 ,  G10L25/27

摘要： MPEG 1 Audio data compression is based on subband coding. A quantization is performed using a psychoacoustic model which is adapted to the masking behavior of the human hearing. Each subband signal is quantized in such a way that the quantization noise introduced by the coding will not exceed the masking curve for that subband. In ISO/IEC 11172-3 two independent psychoacoustic models are defined. The output from these psychoacoustic models is a set of Signal-to-Masking Ratios, SMRn, for every subband n. In order to calculate the SMRn for the psychoacoustic model 2 according to the invention a Fast Fourier Transformation is performed with a length of L=1152 samples by calculating k subtransformations over 2N samples with k*2N=L and fitting together the results of the k subtransformations.

摘要翻译： MPEG 1音频数据压缩基于子带编码。 使用适合人类听觉的屏蔽行为的心理声学模型来执行量化。 每个子带信号被量化，使得由编码引入的量化噪声不会超过该子带的掩蔽曲线。 在ISO / IEC 11172-3中，定义了两个独立的心理声学模型。 这些心理声学模型的输出是针对每个子带n的一组信号到掩蔽比SMRn。 为了计算出根据本发明的心理声学模型2的SMRn，通过计算具有k * 2 N = L的2个N个样本的k个子变换，并且拟合 将k子变换的结果合在一起。