1. Method for decoding in a receiving device for a digital transmission system, said method comprising the steps of:
sampling a received word at predeterminable interpolation points in order to obtain the symbols contained in the received word,
obtaining coefficients for the purpose of forming a syndrome polynomial by applying an interpolation, preferably a Fourier transformation to the symbols, and
carrying out an error position search on the basis of the syndrome polynomial with the defined introduction of erasures.
2. Method according to claim 1 wherein carrying out the error position search includes, in a first stage, error-only decoding, based on the syndrome polynomial in order to obtain an error position polynomial, functionally connected to the polynomial, and an error position auxiliary polynomial and, in a second stage, carrying out a zero point investigation based on the error position polynomial and the error position auxiliary polynomial with the defined introduction of erasures.
3. Method according to claim 2, wherein an algebraic decoding method is used for the error-only decoding.
4. Method according to claim 2, wherein the Berlekamp-Massey method is applied for the error-only decoding.
5. Method according to claim 1, wherein the symbol positions of the received word are presorted with reference to their reliability for the purpose of the defined introduction of the erasures.
6. Method according to claim 1, wherein the received symbols are sorted in terms of rising reliability in response to the reliability information generated by the receiving device and successive erasures are introduced at the interpolation points.
7. Method according to claim 1, wherein individual decoding results are buffered and, if a maximum available number of erasures has not yet been reached, are made available to a GMD.
8. Method according to claim 1, wherein the algorithm is aborted with decoding failure after the introduction of a maximum available number of erasures in the case of unsuccessful decoding.
9. Receiving device of a digital transmission system in which, for the purpose of transmitting data, channel coding is undertaken by means of an algebraic block code, said device comprising
a device for sampling a received word with symbols at predeterminable interpolation points,
a decoding device having
devices for obtaining coefficients for the purpose of forming a syndrome polynomial by applying an interpolation, in particular a Fourier transformation to the symbols, and
devices for carrying out an error-only decoding, based on the syndrome polynomial, in order to obtain an error position polynomial functionally connected to the polynomial and based thereon, in order to carry out a zero point investigation with the defined introduction of erasures.
10. Receiving device according to claim 9, comprising a device for generating reliability information with reference to the positions of the symbols of the received word.
11. Receiving device according to claim 9, wherein the decoding device is adapted for decoding Reed-Solomon codes andor their related codes such as, for example, a BCH code.
12. Receiving device according to claim 9, wherein the block code used for the purpose of channel coding is part of a concatenated code.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A liquid crystal display device comprising a liquid crystal display element having a pair of substrates and liquid crystal sandwiched between a pair of substrates and a backlight unit which is arranged at a side opposite to a display surface of the liquid crystal display element,
the backlight unit comprising:
a light guide body,
a plurality of light sources which are arranged at least along one side surface of the light guide body at a plurality of positions whose distances from a display surface of the liquid crystal display element are different from each other and irradiate the irradiation light to the liquid crystal display element,
a reflection member which covers a plurality of light sources and has shielding means which is arranged between each two light sources of a plurality of light sources, and
a housing member which houses the light guide body, a plurality of light sources and the reflection member.
2. A liquid crystal display device according to claim 1, wherein at least two light sources are arranged along one side surface of the light guide body, and
at least two more light sources are arranged along another side surface of the light guide body which are disposed opposite to the one side surface of the light guide body.
3. A liquid crystal display device according to claim 1, wherein surfaces of the reflection member and the shielding means which face the respective light sources in an opposed manner form reflection surfaces.
4. A liquid crystal display device according to claim 1, wherein the reflection member and the shielding means are made of metal.
5. A liquid crystal display device according to claim 4, wherein the housing member is at least partially made of metal and the reflection member is thermally connected with the metal portion of the housing member.