CN-122002389-A - Wireless communication device and wireless communication method

Abstract

The present invention provides a wireless communication apparatus and a wireless communication method, the wireless communication device includes an encoder circuit and a wireless communication circuit. The encoder circuit is used for encoding the same input data to generate and output a plurality of frames with different encoding quality. The wireless communication circuit is configured to receive the plurality of frames from the encoder circuit and transmit at least one selected frame of the plurality of frames to another wireless communication device via a wireless link.

Inventors

• XIE MINGYI

Assignees

• 达发科技股份有限公司

Dates

Publication Date

20260508

Application Date

20251105

Priority Date

20250605

Claims (20)

1. 1. A wireless communications device, comprising: An encoder circuit for encoding the same input data to generate and output a plurality of frames having different encoding qualities, an The wireless communication circuit is used for receiving the frames from the encoder circuit and transmitting at least one frame selected from the frames to another wireless communication device through a wireless link.
2. 2. The wireless communications apparatus of claim 1, wherein the plurality of frames comprises a first frame having a first encoding quality and a second frame having a second encoding quality, the second encoding quality is higher than the first encoding quality, and the at least one frame comprises the first frame.
3. 3. The wireless communication device of claim 2, wherein the wireless communication circuit is further configured to receive a negative acknowledgement indicating that the first frame was not received by the other wireless communication device, and to retransmit the first frame in a retransmission slot in response to the negative acknowledgement, and wherein the at least one frame does not include the second frame.
4. 4. The wireless communication device of claim 2, wherein the wireless communication circuit is further configured to receive an acknowledgement indicating that the first frame was received by the other wireless communication device, and the at least one frame further comprises the second frame, wherein the wireless communication circuit is configured to transmit the second frame in a retransmission slot in response to the acknowledgement.
5. 5. The wireless communication device of claim 4, wherein the wireless communication circuit comprises: A plurality of individual physical layer circuits comprising: A first physical layer circuit for transmitting the first frame, and A second physical layer circuit for transmitting the second frame.
6. 6. The wireless communication device of claim 2 wherein the wireless communication circuit is further configured to receive a flag and determine whether to transmit the second frame in a retransmission slot slightly based on the flag.
7. 7. The wireless communication device of claim 2, wherein the first frame is a lossy compressed frame.
8. 8. The wireless communication device of claim 7, wherein the second frame is a lossy compressed frame.
9. 9. The wireless communication device of claim 7, wherein the second frame is a lossless compressed frame.
10. 10. The wireless communications apparatus of claim 9, wherein the lossless compression frame comprises a plurality of subframes, and the plurality of subframes comprises uncompressed subframes and lossless compression subframes.
11. 11. The wireless communication device of claim 7, wherein the second frame is an uncompressed frame.
12. 12. The wireless communication device of claim 1, wherein the same input data is uncompressed audio data.
13. 13. The wireless communication device of claim 1, wherein the wireless link is a bluetooth link.
14. 14. The wireless communication device of claim 13, wherein the bluetooth link is a low energy synchronization channel.
15. 15. The wireless communication device of claim 13, wherein the wireless communication device is an adapter, a cell phone, or a notebook computer, and the other wireless communication device is a headset, a horn, or an earphone.
16. 16. A method of wireless communication, comprising: performing an encoding operation on the same input data to generate and output a plurality of frames having different encoding qualities, and At least one selected frame of the plurality of frames is transmitted to the wireless communication device over the wireless link.
17. 17. The method of claim 16, wherein the plurality of frames comprises a first frame having a first encoding quality and a second frame having a second encoding quality, the second encoding quality being higher than the first encoding quality, and the at least one frame comprises the first frame.
18. 18. The wireless communication method of claim 17, further comprising: receiving a negative acknowledgement indicating that the first frame was not received by the wireless communication device, and Retransmitting the first frame in a retransmission slot in response to the negative acknowledgement; wherein the at least one frame does not include the second frame.
19. 19. The wireless communication method of claim 17, further comprising: receiving an acknowledgement indicating that the first frame has been received by the wireless communication device; Wherein the at least one frame further comprises the second frame, and the second frame is transmitted in a retransmission slot in response to the acknowledgement.
20. 20. The method of claim 16, wherein the first frame is a lossy compressed frame, and the second frame is a lossy compressed frame, a lossless compressed frame, or an uncompressed frame.

Description

Wireless communication device and wireless communication method Technical Field The present invention relates to wireless communication, and more particularly, to a packet-level Adaptive Bit Rate (ABR) controlled wireless communication apparatus and related wireless communication method. Background Lossless audio is the best audio form because it does not degrade the quality of sound and the audio file does not experience degradation during compression, the lossless audio heard by the user is as good as the original audio, however, lossless audio playback requires a high data rate in order to transfer a lossless compressed audio bitstream from the source device (source device) to the sink device (SINK DEVICE). In order to meet the high data rate requirements, the throughput of the physical layer (PHYSICAL LAYER, hereinafter simply referred to as "PHY") must be high, which requires a wider PHY bandwidth. However, in noisy environments, it is difficult to maintain audio stability over a wide PHY bandwidth, which can lead to audio frame loss and degradation of lossless audio playback quality. In addition, the transmission throughput between the source device and the receiving device may be limited and may vary over time, and thus a rate control (rate control) scheme is generally employed to ensure that the bit stream can be transmitted/received on time. For example, a typical rate estimation (rate estimation, hereinafter simply "RE") mechanism may be implemented at the source or the sink. The rate estimation result of the RE mechanism is reported to the encoder of the source device with a response delay (response delay), and the source encoder actually changes its output bit rate with a processing delay (processing delay). Considering the situation where the transmission throughput between the source device and the receiving device decreases to a lower level, which may lead to an increase in the packet loss rate of the audio data, the receiving device may experience audio interruption (audio drop) before the source encoder actually decreases the bit rate by a typical RE-based rate control scheme, and in particular, the bit rate control delay (which may include a response delay and a processing delay) is a big problem for low-latency uncompressed/lossless (uncompressed/lossless) audio applications. Thus, there is a need for an innovative ABR control scheme that does not use the typical RE mechanism and that can meet the requirements of low-latency uncompressed/lossless audio applications. Disclosure of Invention One of the objectives of the present invention is to provide a wireless communication device and related wireless communication method for packet-level ABR control. In one embodiment of the present invention, a wireless communication device is disclosed. The wireless communication device includes an encoder circuit and a wireless communication circuit. The encoder circuit is used for encoding the same input data to generate and output a plurality of frames with different encoding quality. The wireless communication circuit is configured to receive the plurality of frames from the encoder circuit and transmit at least one selected frame of the plurality of frames to another wireless communication device via a wireless link. In one embodiment of the invention, a wireless communication method is disclosed. The wireless communication method includes performing an encoding operation on the same input data to generate and output a plurality of frames having different encoding qualities, and transmitting at least one selected frame of the plurality of frames to a wireless communication device via a wireless link. By using the data packet level ABR control scheme provided by the invention, seamless switching between stable-oriented transmission in noisy environment and quality-oriented transmission in clean environment can be realized without audio jitter. Furthermore, since the low quality/bit rate bit stream is transmitted with higher priority than the high quality/bit rate bit stream, the packet error rate of the high quality/bit rate bit stream (e.g., lossless bit stream or uncompressed bit stream) is no longer a bottleneck. Drawings Fig. 1 is a schematic diagram of an audio codec (coder-decoder) model with packet-level ABR control according to an embodiment of the present invention. Fig. 2 is a schematic diagram of a wireless communication device using a packet-level ABR control scheme according to an embodiment of the invention. Fig. 3 is a flowchart of a packet level ABR control method according to an embodiment of the invention. Fig. 4 is a diagram of the retransmission slots available between the transmissions of two frames. Fig. 5 is a schematic diagram of an operational scenario for retransmitting a previously transmitted low quality/low bit rate frame for a retransmission slot. Fig. 6 is a schematic diagram of an operating scenario in which retransmission slots are reused for transmitting high quali