Abstract:
A converter which may be used for implementing either logarithmic or inverse-logarithmic functions is disclosed. The converter includes a memory (22), two multipliers (28 and 30), and two adders (32 and 34). The memory (22) stores a plurality of coefficients which are based on a second-order Taylor polynomial used to estimate a logarithmic or inverse-logarithmic function over a domain of input values. A method of using the converter is also disclosed.
Abstract:
Die Erfindung betrifft ein Verfahren zum Erfassen eines Umfelds eines Fahrzeugs mit einer Anzahl Sensoren (14), bei dem von mindestens einem Sensor (14) während zumindest eines Echo-Zyklus mindestens eine Echo-Information zu dem Umfeld erfasst und mit einem Algorithmus komprimiert wird, und bei dem die mindestens eine komprimierte Echo-Information an mindestens eine Verarbeitungseinheit (18, 20) übertragen wird.
Abstract:
Systems and methods for resizing a signal for use with a fixed-point DSP are provided. More specifically, a process called companding is used in conjunction with fixed- point devices to resize a signal to make use of the available range of these devices. In some embodiments, companding is used to improve the signal-to-noise and distortion ratio. Also, information loss associated with quantization and rounding errors can be reduced in some embodiments.
Abstract:
A computer-implemented method, system, and apparatus for storing binary data is disclosed. A processor receives a digital bit stream and transforms the digital bit stream to an encoded digital bit stream. The encoded digital bit stream comprises a data message encoded by an OCTS-expanded table for storage. The processor stores the encoded digital bit stream on a digital data storage device or system.
Abstract:
In a cable return path system, a method for performing digital companding adds a predetermined offset to the digital value to be companded, and employs a modified µ-law or a-law companding technique to obtain a reduced bit length digital value. One embodiment of this modified approach adds a predetermined offset (e.g., 129 for a 12-bit implementation) to the digital value before companding and then employs a two-bit chord and a 5-bit step for the 12-bit implementation. The end result is that the performance metrics are not significantly compromised by this bit reduction when compared to current transmission methods without this technique.
Abstract:
In a computer system for creating images of three-dimensional objects, an apparatus and method for processing depth values representing the relative depths of the objects. The depth values are transformed according to projections in order to give the appearance of depth when the objects are displayed on a two-dimensional computer screen. These transformed depth values are then interpolated using N bits of precision. Next, the depth values are encoded into a format whereby the depth values have less than N bits. These encoded depth values are stored into memory. In displaying the objects, the encoded depth values are read from memory and compared to determine the relative depths of the objects.
Abstract:
A converter which may be used for implementing either logarithmic or inverse-logarithmic functions includes a memory (20), a multiplier (22), and an adder (38). The memory (20) stores a plurality of pre-computed values which are used in an interpolation to estimate a logarithmic or inverse-logarithmic function over a domain of input signals.
Abstract:
A converter, which may be used for implementing either logarithmic or inverse-logarithmic functions, includes a memory (24), a multiplier (26), and an adder (28). The memory (24) stores a plurality of parameters which are derived using a least squares method to estimate a logarithmic or inverse-logarithmic function over a domain of input values.
Abstract:
A method for compressing IQ data for high speed transport link and an associated device. The method comprises: determining, based on dynamical statistical distribution of the IQ data, one or more parameters of a companding function for a nonlinear companding operation(S310); applying the companding function with the determined one or more parameters on the IQ data(S320); performing uniform quantization on the IQ data to generate compressed IQ data(S330); and transmitting the compressed IQ(S340). And a method for decompressing compressed IQ data for high speed transport link, and an associated device.