Encoding and decoding video signals using dynamically generated quantization matrices

Claim 2

A computer-implemented process for encoding video signals, comprising the steps of: (a) generating a plurality of quantization matrices using one or more quantization matrix parameters; (b) encoding video signals using the quantization matrices to generate encoded video signals; and (c) generating an encoded bit stream comprising the encoded video signals and the quantization matrix parameters.

Claim 3

The process of claim 1, wherein step (a) comprises the step of generating the quantization matrices using at least one base matrix.

Claim 4

The process of claim 2, wherein the encoded bit stream comprises a flag indicating whether the base matrix is a default base matrix.

Claim 5

The process of claim 2, wherein: step (a) comprises the step of generating the quantization matrices using the base matrix and a tilt parameter; and the encoded bit stream comprises the tilt parameter.

Claim 6

The process of claim 2, wherein: step (a) comprises the step of generating the quantization matrices using the base matrix, a quantization start parameter, and a quantization step parameter; and the encoded bit stream comprises the quantization start parameter and the quantization step parameter.

Claim 7

The process of claim 5, wherein: step (a) comprises the step of generating a plurality of intraframe quantization matrices using the base matrix, the quantization start parameter, the quantization step parameter, and a DC coefficient step parameter; and the encoded bit stream further comprises the DC coefficient step parameter.

Claim 8

The process of claim 2, wherein: step (b) comprises the step of quantizing the video signals using bit shifts; and the encoded bit stream comprises a flag indicating whether dequantization may be implemented using bit shifts.

Claim 9

The process of claim 1, wherein: step (a) comprises the steps of: (1) generating a plurality of intraframe quantization matrices using an intraframe base matrix, an intraframe tilt parameter, a quantization start parameter, a quantization step parameter, and a DC step parameter; and (2) generating a plurality of interframe quantization matrices using an interframe base matrix, an interframe tilt parameter, the quantization start parameter, and the quantization step parameter; step (b) comprises the step of encoding the video signals using the intraframe quantization matrices and the interframe quantization matrices; and the encoded bit stream comprises: a flag indicating whether the base matrix is a default base matrix; the quantization start parameter; the quantization step parameter; the DC coefficient step parameter; the interframe tilt parameter; the intraframe tilt parameter; and a flag indicating whether dequantization may be implemented using bit shifts.

Claim 10

The process of claim 8, wherein the encoded bit stream comprises: a 6-bit QuantStart parameter; a 6-bit QuantStep parameter; a 6-bit DCstep parameter; a 6-bit Tilt[0] parameter; a 6-bit Tilt[1] parameter; and a 1-bit PowersOf2 parameter.

Claim 11

The process of claim 9, wherein the encoded bit stream further comprises: a 384-bit interframe base matrix; and a 384-bit intraframe base matrix.

Claim 14

The apparatus of claim 11, wherein means (a) comprises means for generating the quantization matrices using at least one base matrix.

Claim 15

The apparatus of claim 12, wherein the encoded bit stream comprises a flag indicating whether the base matrix is a default base matrix.

Claim 16

The apparatus of claim 12, wherein: means (a) comprises means for generating the quantization matrices using the base matrix and a tilt parameter; and the encoded bit stream comprises the tilt parameter.

Claim 17

The apparatus of claim 12, wherein: means (a) comprises means for generating the quantization matrices using the base matrix, a quantization start parameter, and a quantization step parameter; and the encoded bit stream comprises the quantization start parameter and the quantization step parameter.

Claim 18

The apparatus of claim 15, wherein: means (a) comprises means for generating a plurality of intraframe quantization matrices using the base matrix, the quantization start parameter, the quantization step parameter, and a DC coefficient step parameter; and the encoded bit stream further comprises the DC coefficient step parameter.

Claim 19

The apparatus of claim 12, wherein: means (b) comprises means for quantizing the video signals using bit shifts; and the encoded bit stream comprises a flag indicating whether dequantization may be implemented using bit shifts.

Claim 20

The apparatus of claim 11, wherein: means (a) comprises: (1) means for generating a plurality of intraframe quantization matrices using an intraframe base matrix, an intraframe tilt parameter, a quantization start parameter, a quantization step parameter, and a DC step parameter; and (2) means for generating a plurality of interframe quantization matrices using an interframe base matrix, an interframe tilt parameter, the quantization start parameter, and the quantization step parameter; means (b) comprises means for encoding the video signals using the intraframe quantization matrices and the interframe quantization matrices; and the encoded bit stream comprises: a flag indicating whether the base matrix is a default base matrix; the quantization start parameter; the quantization step parameter; the DC coefficient step parameter; the interframe tilt parameter; the intraframe tilt parameter; and a flag indicating whether dequantization may be implemented using bit shifts.

Claim 21

The apparatus of claim 18, wherein the encoded bit stream comprises: a 6-bit QuantStart parameter; a 6-bit QuantStep parameter; a 6-bit DCstep parameter; a 6-bit Tilt[0] parameter; a 6-bit Tilt[1] parameter; and a 1-bit PowersOf2 parameter.

Claim 22

The apparatus of claim 19, wherein the encoded bit stream further comprises: a 384-bit interframe base matrix; and a 384-bit intraframe base matrix.

Claim 23

The apparatus of claim 18, wherein the apparatus is connected to a bus and the bus is further connected to a memory device.

Claim 24

The apparatus of claim 11, wherein the apparatus is connected to a bus and the bus is further connected to a memory device.

Claim 25

A computer-implemented process for decoding video signals, comprising the steps of: (a) providing an encoded bit stream comprising encoded video signals and one or more quantization matrix parameters; (b) generating a plurality of quantization matrices using the quantization matrix parameters; and (c) decoding the encoded video signals using the quantization matrices to generate decoded video signals.

Claim 26

A computer-implemented process for decoding video signals, comprising the steps of: (a) providing an encoded bit stream comprising encoded video signals and one or more quantization matrix parameters; (b) generating a plurality of quantization matrices using the quantization matrix parameters; and (c) decoding the encoded video signals using the quantization matrices to generate decoded video signals.

Claim 27

The process of claim 23, wherein step (b) comprises the step of generating the quantization matrices using at least one base matrix.

Claim 28

The process of claim 24, wherein the encoded bit stream comprises a flag indicating whether the base matrix is a default base matrix.

Claim 29

The process of claim 24, wherein: the encoded bit stream comprises a tilt parameter; and step (b) comprises the step of generating the quantization matrices using the base matrix and the tilt parameter.

Claim 30

The process of claim 24, wherein: the encoded bit stream comprises a quantization start parameter and a quantization step parameter; and step (b) comprises the step of generating the quantization matrices using the base matrix, the quantization start parameter, and the quantization step parameter.

Claim 31

The process of claim 27, wherein: the encoded bit stream further comprises a DC coefficient step parameter; and step (b) comprises the step of generating a plurality of intraframe quantization matrices using the base matrix, the quantization start parameter, the quantization step parameter, and the DC coefficient step parameter.

Claim 32

The process of claim 24, wherein: the encoded bit stream comprises a flag indicating whether dequantization may be implemented using bit shifts; and step (c) comprises the step of dequantizing the encoded video signals using bit shifts.

Claim 33

The process of claim 23, wherein: the encoded bit stream comprises: a flag indicating whether the base matrix is a default base matrix; the quantization start parameter; the quantization step parameter; the DC coefficient step parameter; the interframe tilt parameter; the intraframe tilt parameter; and a flag indicating whether dequantization may be implemented using bit shifts; step (b) comprises the steps of: (1) generating a plurality of intraframe quantization matrices using an intraframe base matrix, the intraframe tilt parameter, the quantization start parameter, the quantization step parameter, and the DC step parameter; and (2) generating a plurality of interframe quantization matrices using an interframe base matrix, the interframe tilt parameter, the quantization start parameter, and the quantization step parameter; and step (c) comprises the step of decoding the encoded video signals using the intraframe quantization matrices and the interframe quantization matrices.

Claim 34

The process of claim 30, wherein the encoded bit stream comprises: a 6-bit QuantStart parameter; a 6-bit QuantStep parameter; a 6-bit DCstep parameter; a 6-bit Tilt[0] parameter; a 6-bit Tilt[1] parameter; and a 1-bit PowersOf2 parameter.

Claim 35

The process of claim 31, wherein the encoded bit stream further comprises: a 384-bit interframe base matrix; and a 384-bit intraframe base matrix.

Claim 38

The apparatus of claim 33, wherein means (b) comprises means for generating the quantization matrices using at least one base matrix.

Claim 39

The apparatus of claim 34, wherein the encoded bit stream comprises a flag indicating whether the base matrix is a default base matrix.

Claim 40

The apparatus of claim 34, wherein: the encoded bit stream comprises a tilt parameter; and means (b) comprises means for generating the quantization matrices using the base matrix and the tilt parameter.

Claim 41

The apparatus of claim 34, wherein: the encoded bit stream comprises a quantization start parameter and a quantization step parameter; and means (b) comprises means for generating the quantization matrices using the base matrix, the quantization start parameter, and the quantization step parameter.

Claim 42

The apparatus of claim 37, wherein: the encoded bit stream further comprises a DC coefficient step parameter; and means (b) comprises means for generating a plurality of intraframe quantization matrices using the base matrix, the quantization start parameter, the quantization step parameter, and the DC coefficient step parameter.

Claim 43

The apparatus of claim 34, wherein: the encoded bit stream comprises a flag indicating whether dequantization may be implemented using bit shifts; and means (c) comprises means for dequantizing the encoded video signals using bit shifts.

Claim 44

The apparatus of claim 1, wherein: the encoded bit stream comprises: a flag indicating whether the base matrix is a default base matrix; the quantization start parameter; the quantization step parameter; the DC coefficient step parameter; the interframe tilt parameter; the intraframe tilt parameter; and a flag indicating whether dequantization may be implemented using bit shifts; means (b) comprises: (1) means for generating a plurality of intraframe quantization matrices using an intraframe base matrix, the intraframe tilt parameter, the quantization start parameter, the quantization step parameter, and the DC step parameter; and (2) means for generating a plurality of interframe quantization matrices using an interframe base matrix, the interframe tilt parameter, the quantization start parameter, and the quantization step parameter; and means (c) comprises means for decoding the encoded video signals using the intraframe quantization matrices and the interframe quantization matrices.

Claim 45

The apparatus of claim 40, wherein the encoded bit stream comprises: a 6-bit QuantStart parameter; a 6-bit QuantStep parameter; a 6-bit DCstep parameter; a 6-bit Tilt[0] parameter; a 6-bit Tilt[1] parameter; and a 1-bit PowersOf2 parameter.

Claim 46

The apparatus of claim 41, wherein the encoded bit stream further comprises: a 384-bit interframe base matrix; and a 384-bit intraframe base matrix.

Claim 47

The apparatus of claim 40, wherein the apparatus is connected to a bus and the bus is further connected to a memory device.

Claim 48

The apparatus of claim 33, wherein the apparatus is connected to a bus and the bus is further connected to a memory device.