High-definition dual video decoder and decoding method, and digital broadcasting receiver using the same
First Claim
1. A dual video decoder of a digital broadcasting receiver having first and second system decoders for decoding and outputting first and second video PESs (Packetized Elementary Streams) from TS (Transport Stream) bit streams of channels concurrently tuned and demodulated through first and second tuners, the decoder comprising:
- a first PES decoder for decoding the first video PES outputted from the first system decoder, into a first video ES;
a second PES decoder for decoding the second video PES outputted from the second system decoder, into a second video ES;
a VBV (Video Buffer Verifier) buffer memory divided into a first video ES region and a second video ES region, for temporarily storing the first and second video ESs outputted from the first and second PES decoders, in corresponding first video ES region and second video ES region;
a decoding controller for, if a decoding mode and a display mode having image information are set, outputting a control signal to determine a to-be-decoded video ES among the first and second video ESs, and independently decode the first and second video ESs in a single decoding unit by using a display synchronous signal; and
the single decoding unit for reading the to-be-decoded video ES from the corresponding region of the VBV buffer memory in a predetermined unit of decoding under the control of the decoding controller to restore the read video ES to an original video signal through VLD (Variable Length Decoding) with synchronization to the display synchronous signal, IQ (Inverse quantizing), IDCT (Inverse Discrete Cosine Transforming), and MC (Motion Compensating).
1 Assignment
0 Petitions
Accused Products
Abstract
A dual video decoder of a digital broadcasting receiver is provided. The decoder includes: a first PES decoder for decoding a first video PES outputted from a first system decoder, into a first video ES; a second PES decoder for decoding a second video PES outputted from a second system decoder, into a second video ES; a VBV (Video Buffer Verifier) buffer memory divided into a first video ES region and a second video ES region; a decoding controller for outputting a control signal to determine a to-be-decoded video ES among the first and second video ESs, and independently decode the first and second video ESs in a single decoding unit; and the single decoding unit for reading the to-be-decoded video ES from the corresponding region of the VBV buffer memory.
38 Citations
22 Claims
-
1. A dual video decoder of a digital broadcasting receiver having first and second system decoders for decoding and outputting first and second video PESs (Packetized Elementary Streams) from TS (Transport Stream) bit streams of channels concurrently tuned and demodulated through first and second tuners, the decoder comprising:
-
a first PES decoder for decoding the first video PES outputted from the first system decoder, into a first video ES;
a second PES decoder for decoding the second video PES outputted from the second system decoder, into a second video ES;
a VBV (Video Buffer Verifier) buffer memory divided into a first video ES region and a second video ES region, for temporarily storing the first and second video ESs outputted from the first and second PES decoders, in corresponding first video ES region and second video ES region;
a decoding controller for, if a decoding mode and a display mode having image information are set, outputting a control signal to determine a to-be-decoded video ES among the first and second video ESs, and independently decode the first and second video ESs in a single decoding unit by using a display synchronous signal; and
the single decoding unit for reading the to-be-decoded video ES from the corresponding region of the VBV buffer memory in a predetermined unit of decoding under the control of the decoding controller to restore the read video ES to an original video signal through VLD (Variable Length Decoding) with synchronization to the display synchronous signal, IQ (Inverse quantizing), IDCT (Inverse Discrete Cosine Transforming), and MC (Motion Compensating). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A dual video decoding method of a digital broadcasting receiver in which first and second video ESs are extracted from video PESs of first and second channels, which are concurrently tuned and demodulated through first and second tuners, and stored in a VBV (Video Buffer Verifier) buffer memory, and the stored first and second video ESs are decoded through a single video decoder, the method comprising the steps of:
-
(a) if a decoding mode and a display mode having image information are set, determining a to-be-decoded video ES among the first and second video ESs, and waiting a predetermined transition state of a display synchronous signal;
(b) checking the frame rate of the determined to-be-decoded video ES by using a display field number (display_number) determined suitably to the display synchronous signal in a transition state of the display synchronous signal, and performing a next decoding or waiting without the decoding until a next display synchronous signal duration;
(c) decoding picture header information of a corresponding video frame in case where it is determined that a previous decoding is not in a suspended state by using an indication signal informing of suspended decoding, and bypassing the decoding of the picture header information in case where it is determined that the previous decoding is in the suspended state;
(d) comparing a DTS (Decoding Time Stamp), which is inserted into the corresponding video frame, with a STC (System Time Clock), which is calculated by an entire reference clock of the receiver, to determine whether or not to correspond to any one of waiting, skip and decoding states;
(e) in case where it is determined to correspond to the waiting state, setting the indication signal, which informs of the suspended decoding, to ‘
1’
, and waiting without the decoding until the next display synchronous signal duration; and
(f) skipping the decoding of the determined to-be-decoded video ES in a predetermined unit of decoding in case where it is determined to correspond to the skip state, and performing the determined to-be-decoded video ES in a video frame unit in case where it is determined to correspond to the decoding state. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A digital broadcasting receiver comprising:
-
a first tuner for tuning one of a plurality of channel signals received through an antenna, to demodulate the tuned channel signal to a first TS (Transport Stream) bit stream;
a second tuner for tuning one of the plurality of channel signals received through the antenna, to demodulate the tuned channel signal to a second TS bit stream;
a first system decoder for decoding a first video PES from the demodulated first TS bit steam, and outputting the decoded first video PES;
a second system decoder for decoding a second video PES from the demodulated second TS bit steam, and outputting the decoded second video PES;
a single video decoder for decoding each of the first and second video PESs outputted from the first and second system decoders into the video ESs, and determining a to-be-decoded video ES among the first and second video ESs depending on the decoding mode and the display mode, and decoding the determined to-be-decoded video ES in a video frame unit at a predetermined transition state of a display synchronous signal; and
a screen combining unit for combining and outputting first and second video signals, which are dual-decoded and outputted in the video frame unit from the single video decoder, in the display mode. - View Dependent Claims (20, 21, 22)
-
Specification